Human immunodeficiency virus (HIV) infection results from 1 of 2 similar retroviruses (HIV-1 and HIV-2) that destroy CD4+ T lymphocytes and impair cell-mediated immunity, increasing risk of certain infections and cancers.

I SWAPPED OUT MY SURGICAL MASK for the N95 and KN94 ones. Given my newer masks are not inexpensive, how long can I wear one...

The MAHA movement says they will restore trust in Federal health agencies that lost public support during the pandemic.

Hepatitis is an inflammation of the liver. Viruses cause most cases of hepatitis. The type of hepatitis is named for the virus that causes it; hepatitis A, hepatitis B, hepatitis C, hepatitis D and hepatitis E.