Novavax says vaccine is 90% effective against Covid-19

Novavax says its vaccine appears effective against COVID-19 in a large study, including against variants. "The major takeaways from the study are that we had overall, we had 90% efficacy, which is very high, particularly at a time when there are many variants circulating, in fact, mostly variant circulating during the trial," said Stanley Erck, the CEO of Novavax.