doctor hands holding syringe and bottle with vaccine for the cure of new variant coronavirus

2019 2020 africa antibodies bacterium bottle brazil britain care clinic concept contagious cov cov2 covid covid19 cure development disease doctor drug england flu great hands health healthcare holding hospital illness immune immunity immunization infection injection inmunization kingdom laboratory medical medication medicine mers mutation ncov needle new nurse pandemic patient people pharmaceutical poblation prevention professional protection research sars south strain syringe treatment united vaccinating vaccination vaccine variant vial virus