Kinda obvious really isn't it. You wouldn't have herd immunity if a new strain was more contagious and only 3 people had been exposed the first time. The use of the word herd does suggest it is the number of people infected rather than interchangeable any reasons for it to die out
Kinda obvious really isn't it. You wouldn't have herd immunity if a new strain was more contagious and only 3 people had been exposed the first time. The use of the word herd does suggest it is the number of people infected rather than interchangeable any reasons for it to die out