Mosquitoes are a big part of the ecosystem, but often are a nuisance as they bite and feed off of us. Their bites cause itchy red bumps and spread infections and allergies in our bodies. But have you ever wondered why they bite certain people more than others? While some people are plagued by mosquito bites, others barely notice them. Here are some interesting facts about mosquitoes that you must know about!

1. Carbon Dioxide:

Mosquitoes are attracted to a certain smell that emits from the human body that is present in the human skin and sweat, mosquitoes can sense the carbon dioxide or CO2 we breathe out. The more active you are, the more CO2 you emit and the more mosquitoes will be attracted to you. Researchers are still investigating the cause of the variation of body odour that brings them to you, possibly genetics or certain bacteria. The unique combination of sweat and skin bacteria creates a scent that mosquitoes find irresistible. Some chemicals in sweat, like lactic acid and ammonia, are especially attractive to them.

2. Colours

While the reason isn't fully understood, mosquitoes seem to be drawn to dark colours like black more than lighter ones. So, ditch the dark outfit next time you're in mosquito territory. It has been noted that mosquitoes are more likely to leave lighter colours alone.

3. Heat and Vapour

Mosquitoes can detect your body's heat and water vapour, acting like a beacon guiding them right to you. So next time you're feeling sweaty, be aware you might be attracting a lot of mosquitoes. If you are working out or doing something that is making you sweat and your body heat rise, the mosquitoes nearby will be instantly attracted to you. Even mosquitoes are careful about who they pick as a host, some studies even suggest that they like a certain body temperature to feed off of.

An interesting fact about mosquitoes is that they can learn to like a host. They have their own preferences and if they meet a certain person who fits their criteria they might be the next host they move onto. In an older study, it showed that 20 per cent of people with mosquito-borne diseases accounted for 80 per cent of diseases transmitted in the population. They suggest that they only bite a certain set of people within the population.

4. Other factors:

Studies suggest mosquitoes might learn to prefer certain people based on things like what you've been drinking. In a 2002 study, there could be many reasons they like alcohol to making your body temperature high etc. Even pregnant women seem to be extra attractive to them due to higher body temperature and CO2 output.

Cancer is often feared as a silent disease, but in many cases, the body does give early warning signs. The challenge is that these signals are either ignored, misunderstood, or detected too late.

A large number of cancer cases are diagnosed at advanced stages—not because symptoms were absent, but because they were overlooked or diagnosis was delayed.

Understanding the early signs and the reasons behind delayed detection can help save lives.

Speaking to HealthandMe, Dr Siddharth Sahai, Director & Unit Head - Medical Oncology, Max Super Speciality Hospital, Dwarka, shared seven signs of cancer that should not be neglected.

1. Unexplained weight loss

Losing weight without trying—especially more than 4–5 kilos in a short time—can be an early sign of cancers such as stomach, pancreas, or lung cancer.

2. Persistent fatigue

Feeling unusually tired despite adequate rest could signal underlying issues like blood cancers or colon cancer. This kind of fatigue does not improve with sleep.

3. Changes in bowel or bladder habits

Chronic constipation, diarrhea, blood in stool, or changes in urination patterns should not be ignored. These may point toward colorectal, bladder, or prostate cancer.

4. A lump or thickening in the body

Any new lump—especially in the breast, neck, or underarms—needs medical evaluation. Not all lumps are cancerous, but it’s important to rule it out early.

5. Persistent cough or hoarseness

A cough lasting more than 2–3 weeks, or voice changes, could be early signs of lung or throat cancer, especially in smokers.

6. Unusual bleeding or discharge

Bleeding between periods, after menopause, blood in urine, or unusual discharge can be warning signs of cancers such as cervical, uterine, or bladder cancer.

7. Non-healing sores or skin changes

Sores that do not heal, changes in moles, or new skin growths could indicate skin cancer or oral cancer (especially in tobacco users).

Also read: New Breast Cancer Guidelines Recommend Mammograms Every Two Years for Women

Why Cancer Diagnosis Often Gets Delayed

Dr Sahai also mentioned six common causes of delayed cancer diagnosis

Factors that contribute to late detection include:

1. Lack of awareness

Many people are not aware that these symptoms could be linked to cancer. They often dismiss them as minor issues like acidity, infection, or weakness.

2. Ignoring symptoms due to busy lifestyles

In both urban and rural settings, people tend to delay doctor visits due to work commitments, family responsibilities, or simply hoping the problem will resolve on its own.

3. Fear and denial

The fear of being diagnosed with cancer leads many individuals to avoid medical consultation. Denial becomes a major barrier, especially when symptoms are mild initially.

4. Limited access to healthcare in some areas

In smaller towns and rural regions, access to diagnostic facilities and specialists is still limited. This leads to delays in proper testing and referrals.

5. Financial constraints

Concerns about the cost of investigations and treatment often prevent timely medical attention. Many patients wait until symptoms worsen significantly.

6. Misdiagnosis or delayed referral

In some cases, early symptoms may mimic common illnesses. Without timely screening or specialist referral, diagnosis can be delayed.

The Importance Of Early Detection

Dr Sahai stressed that early detection significantly improves cancer outcomes. Most cancers, if identified in the initial stages, are treatable and even curable. The key lies in listening to your body and acting without delay.

Simple steps like regular health check-ups, cancer screening (such as mammography, Pap smear, or oral screening), and timely consultation can make a crucial difference.

Ignoring symptoms may seem convenient in the short term—but early action can save not just time, but life itself.

Earlier this week, in shocking news, an investigative BBC report showed that more than 330 children in Pakistan have contracted HIV due to the reuse of syringes in a hospital in Pakistan’s Punjab.

The incident captured on camera was filmed over 32 hours inside THQ Taunsa Hospital in late 2025 and showcased persistent unsafe practices, including the reuse of syringes on multi-dose vials, and other unhygienic practices at the healthcare facility.

In an interview with HealthandMe, Dr Ishwar Gilada, the President Emeritus of the AIDS Society of India, spoke about how reusing needles raises health risks.

The Mumbai-based top infectious disease expert noted that the risk of HIV transmission is much less for reused syringes and that the risk is potentially higher for hepatitis B and hepatitis C.

Dr. Gilada, the only Indian serving on the International AIDS Society (IAS) Governing Council, also stressed that the probability of transmission may vary depending on factors such as viral load and the amount of blood present. However, the danger is never zero, he said, stressing the importance of safe and single-use injection practices critical in every healthcare setting.

Risks Of Reusing Syringes

Dr Gilada noted that all the transfusion-transmissible infections can be transmitted, albeit with lesser chances than blood transfusion.

Other than HIV, it can raise the risk of several infections, including:

• Hepatitis B,
• Hepatitis C,
• Syphilis,
• Malaria,
• Ebstein-Barr virus infection,
• Tetanus infection,
• Septicemia,
• Bacterial endocarditis.

Importantly, Dr. Gilada stated that even a tiny amount of infected blood can cause transmission.

However, there is a simple principle in microbiology - the chances of transmission are directly proportional to the inoculum.

"The higher the inoculum, the more the chances. Lower inoculum lowers the risks, but the odds are not zero," the expert added.

Does HIV Spread Through Reused Syringes? How?

Dr Gilada said that the chances of infections are usually through freshly used needles.

"In the needle that was used 15-20 minutes earlier, the blood clots in the bore of the needle. Usually, a drop of blood remains in used needles due to 'capillary action'.

"When the same needle is pricked in the new patient, that drop gets mixed with his/her blood by 'surface tension'. The chance of getting HIV infection through such a mix-up is around 0.1per cent if the previous person had HIV," the expert said.

However, he added that "it will also depend on the HIV viral load of the source person. Those with high viral load can lead to higher chances, but if the source person is on ART and is virally suppressed, the chances are near zero".

Also read: Why India Must Shift Towards Prophylaxis Care For Hemophilia

How Can One Prevent?

Dr. Gilada said that prevention is only through good hygiene practices, such as:

• Using spirit to wipe the body part to be injected,
• Needles should be disposed of in impervious containers.
• The containers should be disposed of in local municipal facilities
• Recycling of any type of needles should be a strict no.

Amid the growing burden of hypertension and related heart disease in India, a team of experts has suggested switching to potassium-enriched low-sodium salt substitutes (LSSS).

In India, more than 1 in 4 people have hypertension, and cumulatively, more than 90 per cent of adults with hypertension are either undiagnosed, untreated, or treated but live with uncontrolled hypertension. This burden needs to be tackled on an urgent basis

In view of this, experts from clinical medicine, public health, and nutrition released a consensus statement recommending potassium-enriched LSSS as an effective intervention to reduce hypertension and cardiovascular disease in India.

Current estimates show that Indians consume between 8 and 11 grams of salt (equivalent to 3.2–4.4 grams of sodium) per day, nearly double the WHO’s recommended limit of 5 grams (2 grams of sodium).

High sodium intake is a key driver of elevated blood pressure. At the same time, potassium plays a complementary role by helping counteract sodium’s effects—yet potassium intake in India remains below optimal levels.

With nearly 80 per cent of sodium intake in India coming from salt added during cooking at the household level, experts emphasized that interventions focused on reducing salt use at home can have the greatest impact.

“High-quality research shows India’s high sodium and low potassium intake is a key driver of hypertension and cardiovascular disease. Low-sodium salt substitutes address both—cutting sodium and restoring potassium, which is key to lowering blood pressure. With no change in taste and appropriate safeguards, this is a safe, scalable solution for India’s NCD prevention strategy,” Prof. Vivekanand Jha, Executive Director of The George Institute for Global Health India.

What Is A Low-sodium Salt Substitute? How Can It Boost Heart Health?

The low-sodium salt substitutes are composed of approximately 70–75 per cent sodium chloride and 25–30 per cent potassium chloride. It reduces sodium intake while increasing potassium consumption, thereby helping to lower blood pressure and reduce cardiovascular risk.

The World Health Organization (WHO), in January 2025, released guidelines recommending potassium-enriched salt to combat hypertension and related heart risks.

The WHO's guideline suggests using K-salt or potassium chloride instead of regular table salt, rich in sodium. It may reduce noncommunicable diseases (NCDs) such as cardiovascular diseases (CVDs) and chronic kidney disease by lowering blood pressure.

Also read: Two Potassium-Rich Foods That Could Lower Blood Pressure Better Than Cutting Salt

It also lowers the risks of other conditions associated with high sodium intake, such as gastric cancer. As per the WHO, every year 80 Lakh people die due to poor diet. Of these, 19 lakh deaths are attributable to high sodium intake.

These alternative salts contain less sodium than regular salt and often include potassium chloride (KCl), with or without other agents, to achieve a flavor similar to regular salt.

Evidence shows potassium - enriched low-sodium salt substitutes are a practical, effective, and scalable solution. The new consensus also marks an important shift from evidence to action, aligned with the Government of India’s commitment to reduce population-level salt intake.

India has committed to a global goal of reducing the average population level sodium intake by 30 per cent by 2030 to help prevent and control non-communicable diseases (NCDs).

Is Potassium Salt Safe?

While the WHO guidelines urged people to partially replace table salt with potassium, concerns have been raised about the safety of LSSS that contain potassium, because too high a level of blood potassium (hyperkalemia) may be harmful, especially to individuals with impaired kidney function.

Experts noted that potassium is safe for most people, including many with early-stage kidney disease, but maintained that caution is primarily necessary for individuals with advanced stages of kidney disease or when potassium levels are already high.

"While we have enough scientific data supporting the benefits of Low-Sodium Salt Substitutes, the evidence-to-action gap must be closed by treating LSSS as a ' dietary vaccine' to treat hypertension. It is the 'low-hanging fruit' of cardiology, a passive intervention that provides 24/7 cardiovascular protection without requiring patients to actually sacrifice the taste of their traditional diet," said Prof. Ambuj Roy, Department of Cardiology, AIIMS, New Delhi.

Also read: Pink Salt vs White Salt: What Difference Does It Make?

Dr. Sandeep Mahajan, Professor, Nephrology, AIIMS, New Delhi, added, “The potential risks of low-sodium salt substitutes are often overstated relative to their population-level benefits. While a small subset of patients—particularly those with advanced kidney disease or on specific medications—require caution, this group is clearly identifiable and can be guided through simple screening and labelling measures".

The expert noted that "nearly 90 per cent of the population can safely benefit from this intervention".

The Consensus recommends priority actions such as:

• Policy integration: Include potassium-enriched LSSS in national sodium reduction strategies, hypertension and NCD guidelines, and update FSSAI standards to enable the safe, widespread use of potassium-enriched LSSS as edible salt.

• Focus on everyday use: Prioritise replacing regular salt with potassium-enriched LSSS in homes and in government nutrition programmes and institutional kitchens, while requiring food industry reformulation to use potassium-enriched LSSS in high salt packaged foods and restaurant meals.