Ongoing Testing for Long-Term Control of COVID-19 Post Vaccination
COVID-19 post vaccination Before the development of vaccines, humans lived with circulating measles, polio, and smallpox viruses due to a level of long-term herd immunity following natural infection. Following the introduction of vaccines, the occurrence of these diseases was reduced by >99 percent, though, with the exception of smallpox, they were never fully eradicated. […]