Well, yes and no. It is thought that Covid-19 can be carried by a person without them showing any outward signs, in addition it will certainly be passed by kissing.
Therefore I would have thought sex with multiple partners, will undoubtedly lead to an acceleration in the spread of the virus.
Sex with multiple partners and polygamy in Africa, along with prostitution has resulted in the 'Aids epidemic' there.
Whether that has got much to do with religion I don't know. More to do with tradition coupled with lack of education and civilisation.