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.

Physical activity is a known factor for better physical and mental well-being. However, imagine severe heat forcing you to remain indoors and not being able to just walk around your neighborhood.

The new study published in the journal The Lancet Global Health predicts that by 2050, the rising temperatures are likely to stop people from being active.

It showed that lack of physical activity, especially for people unable to access gyms, will lead to an estimated 700,000 additional premature deaths.

It is also projected to cause $2.59 billion in annual productivity losses.

“Rising temperatures are projected to increase the prevalence of physical inactivity, translating into additional premature deaths and productivity losses, especially in tropical regions,” said a team of Latin American researchers, led by Pontifical Catholic University of Argentina.

The latest report comes amid climate scientists from the UN Intergovernmental Panel on Climate Change warning of a warmer climate -- between 2.7 and 3.1 degrees Celsius by 2100.

In addition, physical inactivity is already a major global health problem, with about one in three adults failing to meet World Health Organization guidelines for weekly exercise.

Deaths Due To Climate Change

The study models how rising temperatures may affect physical activity globally up to the year 2050 based on an analysis of data from 156 countries between 2000 and 2022.

It suggests that by 2050, an average temperature above 27.8°C per month would increase physical inactivity by

• 1.5 percentage points globally
• 1.85 percentage points in low- and middle-income countries
• No clear impact in high-income countries

“This translates to a predicted 0.47–0.70 million additional premature deaths annually and $2.40–3.68 billion in productivity losses,” the researchers said.

The biggest increase in inactivity will be in hotter regions such as

• Central America,
• the Caribbean,
• Eastern Sub-Saharan Africa,
• Equatorial Southeast Asia

Heat can discourage the most common exercise regimen – walks, lead author Christian Garcia-Witulski, Professor at the Pontifical Catholic University, was quoted as saying to The Washington Post.

“The real-world picture is usually not that people suddenly stop moving altogether. It is that heat that gradually erodes the safe, comfortable, and practical opportunities people have to stay active in everyday life,” Garcia-Witulski said.

Physical Inactivity - A Silent Global Crisis

Regular physical activity promotes both mental and physical health in people of all ages. The WHO advises at least 150 minutes of moderate or 75 minutes of vigorous exercise weekly, alongside regular muscle-strengthening activities.

As per the Global Status Report on Physical Activity 2022, more than 80 percent of adolescents and 27 percent of adults do not meet the WHO’s recommended levels of physical activity.

The UN health body also aims to achieve the global target of a 15 percent relative reduction in the prevalence of physical inactivity by 2030.

The WHO recommends that countries increase levels of physical activitywithin their populations by developing and implementing dedicated comprehensive national policies to ensure safer roads for cycling and walking, accessible opportunities for active recreation where people live, work, and play, and promoting physical activity.

The Lancet researchers called for

• action to protect the public from rising heat,
• design cooler cities,
• provide affordable air-conditioned places to exercise,
• clear advice on how to stay safe in extreme heat,
• reduce greenhouse gas emissions.

Meningitis outbreak has led to authorities in the UK to urge students to get vaccines and antibiotics. Health and Me also reported on the menB vaccine that students 5,000 students in Kent University will be receiving. One of the common symptoms are rashes, however, how does one know if it is a meningitis rash?

How Do You Recognize Meningitis Rash?

As per NHS UK, the rash appears as small, red pinpricks that could turn into red or purple blotches. This rash also does not always appear, this could be a sign of blood poisoning that is caused by meningitis.

The red dots also do not fade when you press the side of a clear glass firmly against the skin. NHS UK notes that anyone with dark skin must check for paler areas, like palms of hands or soles of feet. One much also look at the roof of the mouth or inside of the eyelids.

NHS UK notes that one must call 999, if they find such a rash.

Meningitis Outbreak UK: What Is Happening Now?

A meningitis outbreak in Kent University is now treated as a national incident, after two people have died, one of them being the student of the university. Students have been urged to get vaccines and take antibiotics as health officials are dealing with the "unprecedented" and "explosive" outbreak.

As per the UK Health Security Agency (UKHSA), 15 cases have been reported and all of them have lead to hospital admission. Cases are also expected to rise due to the incubation period of infection to when the symptoms start to appear. The incubation period is from two to 14 days.

Read: Meningitis Outbreak From Kent University Is Now A National Incident, Parents Fighting For Jabs Amid Low Stock

As per experts, many of whom are affected had attended Club Chemistry in Cantebury between 5 to 7 March. UKHSA chief executive Susan Hopkins said the outbreak "looks like a super-spreader" event with "ongoing spread" through universities' halls of residence. She added: "There will have been some parties particularly around this, so there will have been lots of social mixing. I can't yet say where the initial infection came from, how it's got into this cohort, and why it's created such an explosive amount of infections."

She further said that in her 35 years working in medicine, healthcare, and hospitals, "This is the most cases I've ever seen in a single weekend with this type of infection". She added: "It is the explosive nature that is unprecedented here - the number of cases in such a short space of time." She also remarked that this was the "quickest-growing outbreak" she has ever seen in her career.

Who Should Get MenB Vaccine?

As per the University of Oxford, MenB vaccine is given to babies at 8 weeks, 16 weeks, and one year of age.

General Practitioner surgery or clinic also send an appointment for babies to have their MenB vaccination along with their other routine vaccinations.

Read: Meningitis Outbreak: What Is MenB Vaccine?

Additional doses of the vaccine are recommended for people with some long-term health conditions who are at greater risk of more severe meningococcal disease. This includes people with:

• asplenia or splenic dysfunction (a spleen that is missing or does not work properly)
• sickle cell anaemia
• coeliac disease
• complement disorders (the complement system is an important part of the immune system, and disorders of this system can increase a person’s risk to some diseases.)

Meningitis outbreak has led to death of two people, one of them being a student of Kent University. Students have also been urged to get vaccines and take antibiotics. Health and Me also reported on the outbreak and how this has led to panic among parents who are seeking for meningitis B or menB vaccine. 5,000 students in the university halls in Kent will be offered the menB vaccine in the coming days.

Read: Meningitis Outbreak From Kent University Is Now A National Incident, Parents Fighting For Jabs Amid Low Stock

What Is MenB Vaccine?

London School of Hygiene & Tropical Medicine noted that over a dozen people are seriously unwell in hospital and two people have died from an outbreak of meningitis in the UK. As per the UK Health Security Agency, illness may have spread during an event attended by students in Kent. Four cases have been confirmed to be meningitis B through laboratory testing.

As per NHS UK, menB vaccine offers protection against meningococcal group B bacteria, which is identified to be the strain that has infected people. The vaccine is recommended for babies aged 8 weeks, followed by a second dose at 12 weeks and a booster at 1 year.

Read: Kent Uni Meningitis Outbreak Caused By Less-Targeted Strain B

Who Should Get MenB Vaccine?

As per the University of Oxford, MenB vaccine is given to babies at 8 weeks, 16 weeks, and one year of age.

General Practitioner surgery or clinic also send an appointment for babies to have their MenB vaccination along with their other routine vaccinations.

Additional doses of the vaccine are recommended for people with some long-term health conditions who are at greater risk of more severe meningococcal disease. This includes people with:

• asplenia or splenic dysfunction (a spleen that is missing or does not work properly)
• sickle cell anaemia
• coeliac disease
• complement disorders (the complement system is an important part of the immune system, and disorders of this system can increase a person’s risk to some diseases.)

The University of Oxford noted that from August 2025, the MenB vaccine has been offered primarily to gay, bisexual and other men who have sex with men, in a targeted programme to prevent cases of gonorrhoea. This is because these groups of people are at higher risk of acquiring gonorrhoea.

How Does Meningitis B Spread?

Neisseria meningitidis is most commonly found living in the throat. It is spread between people through close contact with secretions from the mouth or airway and usually requires close or prolonged contact between people for the bacteria to be transmitted.

Common Symptoms Of Meningitis

• Headaches
• Neck stiffness
• Fever
• Drowsiness
• Nausea or vomiting
• Increased sensitivity to light

Some meningitis infections can also cause a rash that does not disappear with pressure. However they may not be always visible in the early stages.