Many infectious diseases are seasonally disrupted, like flu.
This is the conclusion of researchers from Columbia University in New York in the journal PLOS Pathogens. In her study she has shown seasonal dynamics in 69 contagious diseases including sleeping sickness, laurel, polio and hepatitis B. The author identifies four possible major factors: climate impacts that also affect the mosquito density. Social rhythms such as school and holiday periods. Ecologic factors such as algal growth, which in turn can benefit bacteria. And biological rhythms – for example, fluctuations of hormones that affect the immune system.
For her study, the scientist has relied on the WHO data, US Center for Disease Control and Prevention and studies already published. This created a calendar that shows the time pattern of the outbreak.