COVID-19 Vaccine Gam-COVID-Vac Lyo

**Semantic type:** Immunologic Factor|Pharmacologic Substance|Virus

**Definition:** A lyophilized formulation of a recombinant human adenoviral (rAd)-based vaccine encoding for the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) spike glycoprotein (SP), with potential immunomodulating and anti-COVID-19 activities. Gam-COVID-Vac contains two components: a rAd type 26 (rAd26) prime component encoding the SARS-CoV-2 S protein gene and a rAd type 5 (rAd5) boost component encoding the SARS-CoV-2 S protein gene Upon intramuscular administration of the Gam-COVID-Vac Lyo, the Ad infects cell and produces SP. The released SP activates the immune system to induce a humoral and cell-mediated immune response against SARS-CoV-2. This may prevent SARS-CoV-2 infection and inhibit viral replication. SP, usually found on the surface of SARS-CoV-2, plays an essential role in the infection pathway of the SARS-CoV-2 virus.

**Synonyms:** - Gam-COVID-Vac Lyo - Lyophilized rAd26/rAd5-expressing SARS-CoV-2 SP Vaccine Gam-COVID-Vac Lyo