doctor in blue gloves is holding a syringe with a vial of vaccine for the 4rd dose, the `booster shot`

19 2019ncov 4rd antibody ba blood blue booster care clinic clinical corona coronavirus corrective covid covid19 doctor dose epidemic gloves health holding immunity immunization indian infection inoculation medication medicine mutation new omicron pandemic preparation prevention protection reinfection sarscov2 shot shots symbol syringe text vaccinate vaccination vaccine variant vial vir viru virus