I don't have a magic ball with me, but there's strong reasons to suspect he'd return to business as usual with maybe more lipservice being paid to masking and air filtering, perhaps OSHA's new covid regulations would've extended all the way to making HEPA filters mandatory which would've better than what we got wrt mandatory testing. I would also strongly suspect that WaPo, NYT, etc instead of running headlines about how uncessesary covid mitigation is, they would be slamming Bernie really hard on not having enough covid mitigation measures. So like you'd be getting people like Taylor Lorenz up the wazoo lol.