America’s public health system has been slow to track H5N1, ignoring important lessons from Covid-19 and downplaying the potential threat that could be on the horizon.
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.