skeptic me would not be buying.
I'd consider looking 'sell to open' the July $15 naked put, play time decay, exit the position 'buy to close' in June when the option price dropped 70%
https://www.barchart.com/stocks/quotes/NVAX/options?expiration=2020-07-17-m&moneyness=allRows
Just got out today on 4 days holding, 388% return. Not everyday is like today but, it comes once, in a while. That is why I am an options buyer. I will take the 40-50% win rate and 3 to 1, win/loss ratio.