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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
Everyone has one nostril that is larger than the other.
Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.
The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.