Do you know if those platforms are still offering this kind of bets? Or do they have been warned or closed by local authorities since?
this could be it , the thread :
https://bitcointalk.org/index.php?topic=5284332.0 and the site :
http://coronabet.co/ .
i visit the site and it gives me error i guess it has been taken down already or they can also turned unto scam because the site is questionable but there could be other gambling site that offer the same bets because covid is not over .
the latest news related to covid is the upcoming released of the vaccine and betting sites will get interested to include them .