Polio is a virus that can cause a range of symptoms, from very mild to extremely severe. When severe, it can lead to paralysis. Since immunization against polio, the disease has been eradicated in the US (in 1979)… until now. There are two different vaccines that protect against polio.

Parechovirus is a virus that most often causes symptoms of the common cold. Parechovirus is a known entity that causes illness in children and vulnerable populations. Most often, it causes common cold symptoms, but in more vulnerable populations, such as newborn babies.

Monkeypox is a zoonotic disease caused by the monkeypox virus (which is endemic in certain parts of Africa). It is related to smallpox (which has been eradicated).