What is herd immunity?
Vaccines have injected hope that the end of COVID-19 is in sight. but the pandemic is far from over. achieving what's known as herd immunity could take several more months ? perhaps even into 2022.
Vaccines have injected hope that the end of COVID-19 is in sight. but the pandemic is far from over. achieving what's known as herd immunity could take several more months ? perhaps even into 2022.