We use Zimecterin Gold on our horses. There's always a few tablespoons remaining in each tube after a horse is dosed. We squeeze out what's left and rub it into our skin like you would do with suntan lotion.
Wife and daughter both work at the local VA Hospital, and daughter had class with some kids at her university that brought the covid back from a spring break orgy in sunny Florida last month. Wife and daughter have been tested negative for the covid. None of us have had even a case of the sniffles all winter.
Here's place you can order horse wormer if you don't have a local source:
https://www.statelinetack.com/item/zimecterin-gold-praziquantel-paste-wormer-775/SLT151412/
***The comments above should be taken as anecdotal information. I'm not a doctor, I don't play one on TV, and I didn't stay at a Holiday Inn last night.***