It is not just the influence that is seasonal! The scientist appoints when 31 diseases affect more commonly

It is not just the influence that is seasonal.

According to the research, at least 31 diseases are more likely to hit in certain periods of the year.

The gloomy summer months cause a spike in cases of gonorrhea, genital herpes and cases of syphilis in the northern hemisphere.

And the chickenpox peaks in spring, which may be due to the virus that thrives in hot and humid conditions, the researchers say.

The study also found that "returning to school" in September causes a wave of highly infectious measles among children.

Here, MailOnline lists when you are more likely to be affected by 31 different diseases – and the results may surprise you.

It is not just the influence that is seasonal! Research suggests that at least 31 diseases ranging from gonorrhea to varicella are more likely to hit in certain periods of the year

Professor Micaela Martinez analyzed the statistics of the Centers for Disease Control and Prevention, the World Health Organization and the European Center for Prevention and Control to draw up a list of infectious diseases "of interest to health public ".

Professor Martinez, of Columbia Mailman School of Public Health, then evaluated dozens of scientific articles to determine if these conditions were at their peak during the different seasons of the year.

Some diseases had several studies dedicated to their seasonality, while other rarer disorders had only one.

Professor Martinez also found that diseases can peak at different times of the year in different countries depending on their temperature and rainfall.

At the time the results were collected, some diseases, such as Ebola and the African sleeping sickness, were excluded because they could not be accurately related to a certain period of the year.

Just by looking at when the diseases reach the peak in the northern hemisphere, some may be surprised to learn most of the strikes during the summer.

Heavier temperatures may increase the rate of reproduction of insects carrying diseases such as ticks and mosquitoes, which spread Lyme disease and West Nile virus respectively.

Research has also linked people enjoying warm and long summer evenings to greater libido, which may explain why ISTs are more common during the warmer months of the year.

It is perhaps not surprising that both bird flu and seasonal influenza are more common in winter, which is thought to be due to the virus remaining in the air longer during the cold and dry climate.

In addition to the key role of climate, migration and hibernation of animals can also be important, particularly in less developed countries.

Rabies, for example, can be transported by bats and dogs, while Salmonella lives in chickens.

Environmental factors can also spread diseases, with summer algal blooms responsible for a long time for cholera epidemics in Bangladesh.

Algal blooms occur when microscopic algae multiply rapidly, which often causes colored foam to form on the surface of the water. This prevents the oxygen from reaching deeper parts of the water.

Under these "unfavorable conditions" the chlorea bacteria in the water are transformed into resistant "spores" that are more infectious than the pathogen itself.

Some scientists have also suggested that the natural fluctuations of a human's hormones during the year could weaken their immune system.

The study was published in the journal PLOS Pathogens.

"Seasonality is a powerful and universal feature of infectious diseases, although the scientific community has largely ignored it for most infections," said Professor Martinez.

"A lot of work is needed to understand the forces that drive the seasonality of the disease and understand how we can harness seasonality to design interventions to prevent epidemics and treat chronic infections."

Professor Martinez believes that scientists should continue to analyze databases and official health reports that record infectious diseases. This information could then be combined to determine what determines their seasonality.

"Discovering the mechanisms of seasonality for disease systems would empower the public health community to better control infections," he said.

And knowing when the peak of diseases could allow better control of infections, added Professor Martinez.

He is now studying whether seasonal fluctuations of melatonin "sleep hormone" affect a person's immune system and make them more vulnerable under certain conditions.




Chagas disease



Genital herpes


Hepatitis B

Legionnaire's disease

Lyme disease









Viral meningitis

Weil's disease

West Nile Virus



Chagas disease



Genital herpes

Hepatitis B








Bacterial pneumonia

Bird flu

Haemophilus influenzae




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