The global challenge of HIV/AIDS remains one of the most pressing public health issues today. According to the latest data from UNAIDS, around 38.4 million people worldwide are living with HIV/AIDS, underlining the need for not only medical intervention but also comprehensive awareness, education, and social change. Despite the significant strides made in treatment and prevention, the confusion surrounding the relationship between HIV and AIDS still persists.

Young people have become influential advocates in the fight against HIV/AIDS. Research from UNICEF shows that youth-led initiatives can lower HIV transmission rates by as much as 45% in targeted communities. These young activists utilize digital platforms and peer-to-peer education to dispel myths, promote safe practices, and foster supportive environments for those affected by HIV/AIDS.

Dr Gowri Kulkarni, an expert in Internal Medicine, explains that while the terms HIV and AIDS are often used interchangeably, they are distinctly different. "HIV (Human Immunodeficiency Virus) is a virus that attacks the immune system, whereas AIDS (Acquired Immunodeficiency Syndrome) is a condition that occurs when HIV severely damages the immune system," she clarifies. To understand the implications of these differences, it's important to explore the fundamental distinctions between the two.

1. HIV is a Virus; AIDS is a Syndrome

HIV is the virus responsible for attacking the body’s immune system, specifically targeting CD4 cells, which are crucial for the body’s defense against infections. As HIV progresses, it destroys these cells, weakening the immune system over time. If left untreated, this continuous damage can lead to AIDS.

AIDS, on the other hand, is a syndrome, not a virus. Dr Kulkarni further elaborates that AIDS is a collection of symptoms and illnesses that emerge when the immune system is severely compromised due to prolonged HIV infection. It represents the most advanced stage of HIV, and is characterized by very low CD4 counts or the onset of opportunistic infections like tuberculosis, pneumonia, or certain cancers.

2. Not Everyone with HIV Develops AIDS

A key distinction to remember is that not everyone with HIV will progress to AIDS. Thanks to advancements in medicine, particularly antiretroviral therapy (ART), individuals living with HIV can manage the virus and maintain a healthy immune system for many years, or even decades, without ever developing AIDS. ART works by suppressing the virus to undetectable levels, effectively preventing the damage HIV would otherwise cause to the immune system.

Without treatment, however, HIV progresses through three stages:

- Acute HIV Infection: This stage occurs shortly after transmission and may include symptoms like fever, fatigue, and swollen lymph nodes.

- Chronic HIV Infection: Often asymptomatic or mildly symptomatic, the virus continues to damage the immune system but at a slower rate.

- AIDS: This is the final stage, marked by severe immune damage and the presence of infections that take advantage of the compromised immune defenses.

3. HIV is Transmissible; AIDS is Not

Another key distinction between HIV and AIDS is the way in which they are transmitted. HIV is highly contagious and can be transmitted through the exchange of bodily fluids such as blood, semen, vaginal fluids, and breast milk. It is primarily spread through unprotected sexual contact, sharing needles, or from mother to child during childbirth or breastfeeding.

AIDS, however, is not transmissible. It is not a disease that can be passed from one person to another. Rather, AIDS is the result of untreated, advanced HIV infection and is a direct consequence of the virus’s damage to the immune system.

4. Diagnosis Methods Differ

HIV and AIDS are diagnosed through different methods. HIV is diagnosed through blood tests or oral swabs that detect the presence of the virus or antibodies produced by the immune system in response to the virus. Early detection of HIV is crucial, as it allows for timely intervention and treatment, which can prevent the virus from progressing to AIDS.

AIDS, on the other hand, is diagnosed using more specific criteria. Dr Kulkarni notes that the diagnosis of AIDS is made when the individual’s CD4 cell count falls below 200 cells/mm³, or when opportunistic infections or certain cancers (such as Kaposi's sarcoma or lymphoma) are detected. Diagnosing AIDS involves a more thorough assessment of the individual’s immune function and overall health, as opposed to just the detection of HIV.

5. Treatment Goals Are Different

The treatment goals for HIV and AIDS differ significantly, although both involve antiretroviral therapy (ART). For HIV, the primary treatment goal is to suppress the virus to undetectable levels, thus maintaining a strong immune system and preventing further transmission of the virus. People living with HIV can often live long, healthy lives if they adhere to ART.

For individuals diagnosed with AIDS, the treatment plan becomes more complex. While ART remains an essential part of managing the virus, treatment for AIDS also focuses on addressing the opportunistic infections and secondary health complications associated with severe immune suppression. The goal of treatment for AIDS is not only to manage the HIV virus but also to improve the quality of life and extend survival by treating these secondary health issues.

Role of Community Engagement in Combatting HIV/AIDS

While the medical community has made great strides in managing HIV, the battle to curb its transmission is also a social and cultural issue. Dr Daman Ahuja, a public health expert, highlights that HIV/AIDS awareness and education are vital to reducing transmission rates and supporting those affected by the virus. "Young people, especially, have become key advocates in the fight against HIV/AIDS," says Dr Ahuja. "Research from UNICEF shows that youth-led initiatives can lower HIV transmission rates by as much as 45% in targeted communities."

Additionally, grassroots activism plays a significant role in raising awareness and addressing stigma. As the World Health Organization reports, community-based interventions have been proven to increase HIV testing rates and improve treatment adherence, which are crucial in the fight against the pandemic.

The ultimate goal of organizations like UNAIDS is to eliminate the HIV/AIDS pandemic by 2030. Achieving this requires global collaboration, from medical treatment advancements to public health strategies, education, and advocacy. Dr Kulkarni’s insight underscores the importance of early detection, treatment adherence, and community support in the fight against HIV/AIDS.

Dr Gowri Kulkarni is Head of Medical Operations at MediBuddy and Dr Daman Ahuja, a public health expert and has been associated with Red Ribbon Express Project of NACO between 2007-12.

Arthritis is sometimes treated like a normal part of getting older. Yet it can show up in many age groups. It can also limit how freely someone moves. That can affect daily independence and overall comfort.

Some people think arthritis care always means an operation, like joint replacement. In reality, the path to care is wider. What happens next depends on symptoms, which joint is affected, a person’s age, how active they are, and their general health.

Early-Stage Arthritis: Why Physiotherapy And Exercise Matter

Where the disease is in its early stages or is perceived to be mild, treatment will begin in a very low-key manner. This will involve physiotherapy and exercise. Where necessary, losing excess body weight can be beneficial. Minor changes in daily activities will decrease stress. Doctors will prescribe medication depending on the situation. Here, the main objective is to alleviate symptoms and maintain function. It will not be the initial step and will only be considered where appropriate.

In case arthritis is severe, pain and stiffness will persist for a long period of time. Performing simple activities becomes difficult. Even walking will become challenging. Sleep may also be affected. When this happens, it helps to check again. Doctors can use exam findings and imaging to see how much the joint has changed. They can also review whether non-surgical care is working as expected.

Also read: Arthritis Day: Stanford Researchers Explore Possibility To Treat Osteoarthritis Without Knee Replacement Surgery

How Doctors Decide On The Right Treatment

Good arthritis care is about choosing the right path for the right person. Timing matters too. It begins with a close look at symptoms and a clear diagnosis. Sometimes it also means getting scans when they are needed. After that, the plan should rely on what the best research shows.

Treatment should be set up with rehab in mind. The aim is to fit the person, not just the label on the chart. One person may do well with physical therapy and simple habit shifts. Another person may need a procedure, mainly when a joint is badly worn.

Why Early Arthritis Management Matters

The main goal is easier daily comfort and better movement. Just as important, it should help someone keep their independence. It is also not only about chasing the newest option.

People should not wait until pain makes normal life hard. When they seek help early, it can be easier to see what is driving the joint pain. It can also help show how far the arthritis has gone. With that in hand, a care plan can be built with more clarity.

When care starts early and matches the person, many can stay active longer. They may also better protect joint function and keep it working well for more time.

As pollution levels rise in October, doctors warn that exposure to particulate matter can affect lung and heart health, aggravate existing respiratory conditions, and cause symptoms even in otherwise healthy individuals, particularly as winter approaches.

PM2.5 and PM10 can irritate the respiratory tract, while fine particles such as PM2.5 can penetrate deep into the lungs, with some entering the bloodstream.

Delhi woke up to poor air quality on Thursday, with the Commission for Air Quality Management’s (CAQM) AQI dashboard recording an Air Quality Index (AQI) of 226 across Delhi-NCR at 7 am.

As per the CAQM’s dashboard, some areas of the national capital recorded very poor air quality, with an average AQI of 307.

The Commission for Air Quality Management (CAQM) on Wednesday imposed Stage I of the Graded Response Action Plan (GRAP) across Delhi-NCR after the capital's air quality slipped into the 'poor' category.

According to the Air Quality Early Warning System, Delhi's air quality is likely to remain in the 'poor' category until October 23. The forecast for the following six days also indicates that pollution levels are likely to remain in the same category.

Also read: Delhi Air Pollution Is Back: What Days Of Poor AQI Can Do to Your Lungs

How Air Pollution Affects Lung And Heart Health

Dr. Amit Kumar Mandal, Senior Director - Pulmonology, Paras Health Panchkula, told HealthandMe that air pollution can cause inflammation in the airways and worsen asthma, chronic obstructive pulmonary disease (COPD) and other respiratory conditions. It can also increase the risk of cardiovascular complications.

The effects may not always be immediately noticeable. People may experience persistent coughing, throat irritation, wheezing or breathlessness. Repeated exposure over time can contribute to more serious health problems, even in people without pre-existing conditions.

Dr. A.S. Sandhya, Consultant, Pulmonary & Sleep Medicine, Kailash Hospital & Neuro Institute, told HealthandMe that October can mark the beginning of a prolonged period of poor air quality in Delhi-NCR.

When pollution combines with changing weather conditions, people with asthma, bronchitis and COPD may experience more frequent symptoms. However, healthy individuals can also develop eye irritation, coughing, throat discomfort and reduced exercise tolerance after exposure to polluted air.

How To Protect Yourself From Rising Pollution

Read More: Can Delhi’s Air Pollution Increase GI Cancer Risk? Doctors Report Patients As Young As 15

Doctors recommend monitoring daily AQI levels and limiting exposure when air quality is poor.

Dr. Mandal advises reducing prolonged outdoor activity and avoiding exercise near busy roads during high-pollution periods. Children, older adults, pregnant women and people with respiratory or heart conditions should take extra precautions.

Dr. Sandhya recommends limiting strenuous outdoor exercise when pollution levels are high and using a well-fitted N95 mask when outdoor exposure cannot be avoided.

Indoor air quality also matters, particularly for children and older adults who spend extended periods at home. Air purifiers with suitable filtration may help reduce indoor particulate matter, although they do not eliminate all pollutants.

When To Seek Medical Advice

People should not ignore persistent coughing, wheezing or unusual breathlessness. Those experiencing persistent breathing difficulties, chest discomfort or worsening respiratory symptoms should consult a doctor.

People with existing medical conditions should follow their treatment plans and seek medical advice if their symptoms worsen.

Taking preventive measures now, rather than waiting for pollution to peak in winter, can help reduce exposure and the risk of avoidable health complications in the months ahead.

Climate change is not just raising temperatures and intensifying extreme weather. It may also affect digestive health by disrupting food production, threatening water security and changing the spread of gastrointestinal infections, according to two leading gastroenterology experts from the World Gastroenterology Organization (WGO).

Climate change can contribute to heat-related illnesses and influence the geographic spread of infectious diseases, especially in countries like India.

A February 2025 review in The Lancet Planetary Health outlines how the combined effects of climate change could affect the human gut microbiome, including through food insecurity, malnutrition and exposure to disease-causing pathogens. These challenges could alter the composition of gut microbial communities worldwide.

Research suggests that heat stress may alter gut microbes, digestion and immune function. It may also increase intestinal permeability, potentially allowing toxins and pathogens to enter the bloodstream.

Climate-related drought can disrupt food production and reduce access to nutritious food, potentially affecting the gut microbiome. Environmental changes may also influence food- and waterborne pathogens, increasing infection risks where access to safe water and sanitation is limited.

Speaking to HealthandMe, Professor Geoffrey Metz, professor of medicine at the University of Melbourne, said climate change was becoming an increasing concern for gastrointestinal health.

“Certainly, with global warming, we're seeing a lot more infectious diseases in the gastrointestinal tract,” Metz said.

How Climate Change Can Affect Digestive Health

Also read: 'Humanity Can Still Act': Lancet Warns Of 17 Global Health Threats By 2100

Climate change can affect digestive health through several interconnected pathways, including water availability, food production and infectious diseases.

Metz said the consequences of global warming extend beyond rising temperatures.

“The other thing, of course, with global warming—and this is a major interest of the World Gastroenterology Organisation—is that it's not just making us hot, but it's also creating more drought, which interacts with food production. So there's less food available, impacting our nutrition.”

Drought can disrupt food production and reduce food availability, raising concerns about nutrition. Changes in water availability can also make safe food preparation and hygiene more difficult.

However, the extent to which these environmental changes contribute to specific gastrointestinal diseases requires further investigation.

Safe Water And Food Hygiene Remain Essential

Professor Carolina Olano, professor of gastroenterology in Montevideo, Uruguay, and president of the WGO, highlighted the role of environmental factors in digestive diseases.

“Well, I think it's a combination of many factors. You know that there are some things related to genetics, and we have genetic predispositions to some diseases. But there are also environmental factors related to different diseases, and climate change has an impact too. We are working very hard at the World Gastroenterology Organisation to understand how climate change is affecting different diseases.”

Olano also emphasised the importance of safe drinking water and food hygiene in preventing infections.

“It's also important to have a varied diet and to drink safe, clean water, making sure that the water we drink is safe. Food hygiene is also extremely important.”

She told HealthandMe that handwashing was another simple preventive measure.

“We learned from the COVID pandemic that handwashing before eating is extremely important. These are things we can do every day without spending anything, and they can help prevent many important diseases, especially those related to infections.”

Climate Change Has Wider Health Consequences

Read More: Climate Change Is Affecting Skin Health Worldwide, Warns Study

The effects of climate change may extend beyond the digestive system, affecting multiple aspects of health.

“Global warming is not just affecting how we feel; it's also having an effect on heart disease, lung disease, gastrointestinal disease, obstetrics and gynaecology,” said Metz, who is also the former president of the WGO.

Olano also pointed to population movements as a factor to consider when assessing environmental and health risks.

“As you know, it's not only about weather and climate change. It's also about how populations move from one country to another and what the impact of these movements is when people move from one region to another.”

“Because, as you know, it's not only about weather and climate change. It's also how populations move from one country to another and what the impact of these movements is when people move from one region to another.”

Understanding these connections is important as researchers investigate how climate-related environmental changes may influence disease patterns across regions.

What Can People Do To Protect Their Digestive Health?

While individuals cannot control climate-related changes, Olano highlighted everyday measures that can help prevent infections and support digestive health:

• Drink safe, clean water.
• Maintain food hygiene and handle food safely.
• Wash hands before eating.
• Follow a varied diet.
• Stay physically active.

She also stressed the importance of seeking medical advice about hepatitis prevention, vaccination and testing where appropriate, as well as colorectal cancer screening.

Climate change presents a broader public health challenge, but safe water, food hygiene and infection prevention remain important measures for reducing avoidable digestive health risks.