Thanks to the Operation Warp Speed vaccine acceleration program, Fauci said he expects the US will have "hundreds of millions of doses" of the vaccine ready to deploy by early 2021. However, if a significant percentage of Americans refuse a coronavirus vaccine, the US might not reach the critical level of herd immunity needed to end the pandemic, he said during an interview posted on YouTube on June 28.
Coronavirus vaccine: Are we close to finding one? Here's what's happening
In South Korea, more than 160 people tested positive again after they had recovered from COVID-19. In China, 5%-10% of people tested positive again after they'd recovered, according to news reports. It's not clear whether:
- These people got infected again
- The virus reactivated in their bodies after being quiet for a while, or
- The test results were flawed
COVID-19: Herd Immunity and Reinfection
Months into the pandemic, the scientific community’s understanding of Covid-19, the illness caused by the new coronavirus, is rapidly evolving. New reports of patients testing positive, or appearing to suffer symptoms months after initial diagnosis, continues to generate concern that people who have had Covid-19 are getting infected anew.
Can You Catch Covid-19 Twice?
In conclusion, we are going to have a vaccine prepared in record time, probably by the beginning of 2021. By that time, best case scenario, even pie in the sky scenario, would have 80 million people worldwide who have been infected. Yes, it does mutate slower, but after only 8 million people had been infected there were already more than 14 strains
and one of those strains was more contagious than the others. Since random mutations are a simple numbers game we can expect by the time there is a vaccine that we'll have 140 strains and 10 that are especially virulent.
2nd, there is no way that 8 billion people will be given the vaccine in 2021, in fact it is doubtful that we would give the vaccine to more than 1 billion people in 2021. Therefore this virus will continue to mutate throughout 2021 and those strains that the inoculation does not protect you from will be the most successful in countries that do have the vaccine.