How Vaccine Companies Are Battling Covid-19 Variants

Scientists have recorded dozens of new variants to the original virus — though not all of them pose a threat to how public health officials and biotech companies respond to the ongoing pandemic ... Some companies, like Moderna, have tweaked the mRNA in their original vaccine formula to be more effective against specific variants ... Though companies that  haven’t gotten a vaccine authorization might seem even further behind their competitors, Krofah says these companies actually have an advantage when it comes to variants.