Diseases caused by different types of pathogens have their own seasonality. That is, there is a higher frequency of bacterial and viral diseases in winter and a higher frequency of fungal and parasitological problems in summer. I explain winter, you explain summer.
In winter, people are indoors with frequent touching of the same surfaces, breathing of the same air, as well as frequent contact. Bacterial diseases spread through touching of common surfaces while viral diseases also are spread through breathing in of infectious aerosols (someone’s sneeze, microbes in recycled air). Therefore the incidence of bacterial and viral diseases are greater during the winter.
Why are fungal and protozoan diseases more important in the summer? (3 good reasons).
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