English ComprehensionEasyThe principle by which mass vaccination protects even the unvaccinated is called:Aprivate immunityBherd immunityCvaccine failureDblood donationCheck AnswerAnswerThe correct answer is Option B.Share:WhatsAppTwitter🔗 Copy LinkDetailed SolutionHerd immunity.conceptual solutionHerd immunity.Browse All PYQ PapersTake a Mock Test