Herd immunity is more important than ever with the increase in the number of variant strains. To help fight the spread of COVID-19 it is important that everyone that is eligible to receive the vaccine gets it. There are still many unknown factors that can affect COVID-19 herd immunity, we know that if the new strains of COVID-19 are more contagious than the original disease, then the R-naught will increase. So as the variant strains become more prevalent in the United States, more people will ne