2  3    5SharesWe have been hearing about several new strains of the SARS-CoV-2 virus that causes COVID-19. There may be hundreds or even thousands of variants of the virus, although most may confer no evolutionary advantage and just die out. Of course, there are only a handful of new COVID-19 strains that are actually dangerous, but the … Continue reading New COVID-19 strains – what does it mean for vaccines