The COVID-19 virus changes a little bit each time it’s spread — and scientists will have to keep a close eye on how those changes affect its behavior toward vaccines.
This story is from The SFGate. Read the rest of this News story at https://www.nbcbayarea.com/news/local/race-for-a-vaccine/the-race-against-mutation-how-vaccines-will-keep-up-as-the-coronavirus-evolves/2420234/.