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.

People with a brain age that exceeds their actual age may be at a higher risk of developing dementia, according to a new JAMA Open study.

Brain aging is the natural, progressive process of structural and chemical changes in the brain over time, resulting in typical age-related cognitive decline, such as slower processing speeds, reduced brain volume (atrophy) and memory lapses.

A machine-learning study by University of California San Francisco and Beth Israel Deaconess Medical Center that was published in March 2026 has now found that a higher brain age for every 10-year gap with the actual age increased dementia risk by nearly 40 percent.

Senior author Yue Leng, MBBS, PhD, associate professor of psychiatry at the UCSF School of Medicine said: "Brain age is calculated from sleep brain waves. We know that brain activity during sleep provides a measurable window into how well the brain is aging."

Leng noted that earlier studies have found treating sleep disorders can change sleep-related brain-wave patterns.

"Better body management, such as lowering body mass index and increasing exercise to reduce the likelihood of apnea, may have an impact. But there's no magic pill to improve brain health.," first author Haoqi Sun, PhD, assistant professor of neurology at Beth Israel Deaconess Medical Center also added.

The researchers noted that the results suggest that improving sleep health could influence brain aging.

What Is Dementia?

Dementia is an umbrella term used to describe a significant decline in mental function that is serious enough to affect everyday life. It commonly impacts memory, thinking, and reasoning skills.

Dementia itself is not a single disease but a collection of symptoms caused by underlying conditions such as Alzheimer’s disease or vascular dementia.

Common signs include memory problems, confusion, difficulty finding words, changes in mood or behaviour and trouble completing familiar tasks.

These symptoms usually worsen over time and are not considered a normal part of ageing. Although there is no cure, treatment options can help manage symptoms, and early diagnosis plays an important role in care planning.

Alzheimer’s Disease: The Leading Cause of Dementia

Alzheimer's disease is one of the most common forms of dementia and mostly affects adults over the age of 65.

About 8.8 million Indians aged 60 and above are estimated to be living with Alzheimer's disease. Over seven million people in the US 65 and older live with the condition and over 100,00 die from it annually.

Alzheimer's disease is believed to be caused by the development of toxic amyloid and beta proteins in the brain, which can accumulate in the brain and damage cells responsible for memory.

Amyloid protein molecules stick together in brain cells, forming clumps called plaques. At the same time, tau proteins twist together in fiber-like strands called tangles. The plaques and tangles block the brain's neurons from sending electrical and chemical signals back and forth.

Over time, this disruption causes permanent damage in the brain that leads to Alzheimer's disease and dementia, causing patients to lose their ability to speak, care for themselves or even respond to the world around them.

While there is no clear cause of Alzheimer's disease, experts believe it can develop due to genetic mutations and lifestyle choices, such as physical inactivity, unhealthy diet and social isolation.

Early symptoms of Alzheimer's disease include forgetting recent events or conversations. Over time, Alzheimer's disease leads to serious memory loss and affects a person's ability to do everyday tasks.

There is no cure for this progressive brain disorder and in advanced stages, loss of brain function can cause dehydration, poor nutrition or infection. These complications can result in death.

While it is commonly known that drinking alcohol heavily can lead to multiple chronic conditions, a new global study suggests that moderately drinking wine can decrease your risk dying from cardiovascular disease by 21 percent.

A group of Chinese researchers who analyzed 340,924 adults in the UK between 2006 and 2022 classified a 12-ounce beer, a 5-ounce glass of wine or a 1.5-ounce shot of liquor each contains about 14 grams of pure alcohol.

Those who consumed less than 20 grams per week, about 1.5 standard drinks, were classified as never or occasional drinkers. The low alcohol consumption group included men who drank more than 20 grams per week but no more than 20 grams per day, and women who drank between 10 grams per day and 20 grams per week.

They found those with high alcohol consumption were 24 percent more likely to die from any cause, 36 percent more likely to die from cancer and 14 percent more likely to die from heart disease.

Additionally, even low intake of spirits such as beer or cider was associated with a nine percent higher risk of dying from cardiovascular disease compared with drinking never or occasionally.

Dr Zhangling Chen, a professor at the Second Xiangya Hospital, Central South University in China and the study’s senior author said: “These findings can help refine guidance, emphasizing that the health risks of alcohol depend not only on the amount of alcohol consumed, but also on the type of beverage."

Talking about how wine could lower death risk, the scientists noted that several factors may account for the differences by alcohol type.

Certain compounds present in red wine, such as polyphenols and antioxidants, may have benefits for cardiovascular health. Wine is also more likely to be consumed with meals and by people who have higher-quality diets and healthier behaviors in general, while spirits, beer and cider are more likely to be consumed outside of meals and were associated with lower overall diet quality and other lifestyle risk factors.

"Taken together, these factors suggest that the type of alcohol, how it is consumed and the associated lifestyle behaviors all contribute to the observed differences in mortality risk," Dr Chen said.

Coronary Artery Disease: The Silent Killer

Despite being as a common heart disease, coronary artery disease (CAD) develops over years and has no clear signs and symptoms apart from a heart attack. The illness begins due to a buildup of fats, cholesterol and other substances known as plaque in and on the artery walls.

Over time, this can cause narrowing or blockage of the coronary arteries and block the supply of oxygen-rich blood to heart which can lead chest pain (angina), shortness of breath and ultimately, heart attacks.

Typically, those above the age of 45, having a biological family member with heart disease, lack of sleep, smoking, consuming saturated fats along with other autoimmune diseases such as lupus and rheumatoid arthritis can increase the risk of developing CAD.

Treatment options may include medicines and surgery. Eating a nutritious diet, getting regular exercise and not smoking can help also prevent CAD and the conditions that can cause it.

Nearly one in 10 Indian adults suffer from CAD and about two million people die from the disease annually. Apart from this, about 18 to 20 million American adults aged 20 and older are also affected about the disease.

Strokes: A Rising Crisis In India

Additionally, heart strokes are also one of the leading global health burdens, causing significant deaths and disability worldwide, including in India. Compared to Western countries, stroke also tends to occur at a younger age and is associated with a higher case fatality rate in the country.

One in seven stroke patients in India are young adults aged below 45 years, with hypertension leading as the major risk factor, according to a study by the Indian Council of Medical Research (ICMR).

The Global Burden of Disease Study 2021 identified hypertension, air pollution, tobacco smoking, high cholesterol, increased salt intake, and diabetes as the leading risk factors of stroke.

Incidence of stroke is increasing significantly in low- and middle-income countries (LMICs), especially in India, due to population growth, aging, and greater exposure to risk factors.

If you think that injections of botulinum toxin -- commonly known as Botox -- are only used to make skin wrinkle-free, you may be mistaken.

A new study led by US researchers has shown that Botox injections can act as a “rescue therapy” to treat conditions such as finger ulcers, digital ischemia, and gangrene that are difficult to manage with standard therapies.

Finger ulcers (or digital ulcers) are painful open sores, while acute digital ischemia causes the fingers to become extremely painful, cold, and sometimes pale or bluish in color. Gangrene is the dangerous death of body tissue (necrosis), often turning skin black, green, or purple.

These debilitating complications, often associated with conditions like lupus, rheumatoid arthritis, systemic sclerosis, or bacterial infections, are caused by reduced blood flow to the fingers and heal poorly.

Botox injections, which work by reducing blood vessel constriction and improving circulation, may help achieve complete healing of lesions in more than 85 percent of such patients, according to a study recently published in JAMA Dermatology.

“These new findings are particularly important because therapeutic options remain limited for the cutaneous and vascular manifestations of systemic sclerosis and other autoimmune diseases,” said Dr. Netchiporouk, a scientist in the Infectious Diseases and Immunity in Global Health Program at the Research Institute of the McGill University Health Center.

Netchiporouk noted that the available vasodilator and immunosuppressive treatments are generally administered intravenously.

In contrast to Botox injections, these are also costly, minimally effective, and associated with significant adverse effects.

Also read: Botox Helped Her Burp: How Injectables Changed A 25-Year-Old's Life

The study also described the case of a 50-year-old man with a rare autoimmune disease that caused joint pain and digital necrosis (gangrene).

While traditional medications helped reduce his pain, he was forced to stop working, and the condition severely impacted his quality of life.

However, after receiving botulinum toxin injections, his pain was relieved, and sensation improved within 24 hours, and the necrosis began to improve within two weeks.

“This treatment has become an important tool, especially for patients with autoimmune vascular diseases that result in serious health consequences and for which there are few therapeutic options,” Netchiporouk said.

Also read: Why Regulatory Clarity Is Important for Safe Aesthetic Procedures in India

Botox: Safe, With Minimal Adverse Effects

The study, based on a systematic review and individual patient data meta-analysis of 30 published studies and one unpublished case involving 119 patients, found that only a few patients experienced adverse effects.

These were generally mild and short-lived, most commonly temporary muscle weakness or pain at the injection site.

“Our results show that botulinum toxin can improve blood circulation in the fingers and treat serious complications such as ulcers or gangrene, offering a safe and easy-to-administer alternative,” said Dr. Catherine Zhu, a dermatology resident at the McGill University Health Center.

Zhu added that the injections can be easily administered by rheumatologists and dermatologists in outpatient settings, reducing reliance on intravenous therapies that require hospitalization and increasing overall healthcare costs.

Importantly, in most cases, a single injection session was sufficient to achieve the desired response.

“Botulinum toxin can offer significant benefits with a favorable safety profile. It deserves further study to develop standardized protocols and optimize outcomes,” said Dr. Netchiporouk.