Herd immunity is a type of immunity provided by the major population which is vaccinated or immune against an infectious to some individual of their community which is not immune to that infection.
Herd immunity is generated only when most of the population is immune to that particular disease. For example, in measles, 90-95% of a population should be vaccinated against measles to provide herd immunity to the un-immune individuals. So the correct answer is herd immunity.
Answer: If Shayna is continuously being bothered by these remarks then she should as him to stop. If that does not work or if it starts getting physical she should report it to an older person she can trust if she is a minor, if not then report it to the authorities.
