"Viral respiratory tract infections" . "Microorganisms" . "Occupational safety and health" . "Transfusion medicine" . "Infraspecific virus taxa" . "Immune system" . "1670s in science" . "Sarbecovirus" . "Blood antigen systems" . "Single-pass transmembrane proteins" . "Chiroptera-borne diseases" . "COVID-19" . "EC 3.4.17" . "Genes on human chromosome 6" . "Zoonoses" . "Human MHC haplogroups" . "Gene complexes" .