Hepatits A is an infection due to the hepatitis A virus. It is not possible for a person to get it twice. However, relapse can occur.

Sporadic human infections with highly pathogenic avian influenza (HPAI) A(H5N1) virus, with a wide spectrum of clinical severity and a cumulative case fatality of more than 50%, have been reported ...

The cold sore-causing Herpes Simplex Virus (HSV-1) hijacks human cells and reconfigures its DNA within just an hour after infection, according to a new study that may help tackle the pathogen.

The team’s big idea — hypothesizing in early 2020 that, contrary to the popular narrative, Covid would last in the body — was “visionary,” long Covid researcher Ziyad Al-Aly said.