Herd Immunity means what ? हर्ड इम्युनिटी म्हणजे काय ? #Quailfamilyofficial #Coronavirus #lockdown

Herd Immunity means what ? हर्ड इम्युनिटी म्हणजे काय ? #Quailfamilyofficial #Coronavirus #lockdown<br /><br />Herd immunity can be effective if lockdown and social distancing are not able to control the corona virus.