My father has bad COVID and his manager is forcing him to go into work

My dad has COVID and it’s really bad. He has a high fever and can’t even stand.

His manager is forcing him to come into work and is very adamant. The manager said over the phone, “just wear a mask and it will be fine”.

My dad works at the airport and interacts with people every day. He is quite old and this is the only job he could find that could cover for insurance.

Should he just go into work? He can’t afford to get fired. Could he go to jail for knowingly going into public with COVID? Our family has no idea what to do. We can’t afford a lawyer. I guess we’re looking for advice from someone who might be more knowledgeable than me.