The mandated paid sick leave is an excellent one. Two nations in the world don't have this: the USA, and Papua New Guinea. Hmm.
How does paid sick leave stop the spread of the coronavirus?
There is a testing shortage.
Therefore, people who are sick are urged not to come into work regardless of what they may be sick of. There is no way of telling.
People without sick leave would be more likely to decide to stay at work, telling themselves it’s the regular flu, or seasonal allergies.
Some of those people will actually have COVID-19 and will therefore spread the virus to their coworkers.
Removing the incentive to work despite feeling symptoms will slow the virus spread because more of those people will make the choice to stay home.