Could anyone sue Fox News,

[EmeraldCoaster]

If they had a family member die from Covid after following the misinformation spewed there?

[twin_ghost]

1. Yes, You can sue anybody or corporation for any reason.

If that lawsuit was successful would depend solely on what the law is.

[Ocelot II]

2. They could try it but the lawsuit probably wouldn't be successful.

They'd have to prove by a preponderance of the evidence that Fox's bad information was a proximate cause of the death of the family member, which means there couldn't be an intervening or superseding cause - that is, that they relied on bad information from some other source, not Fox. They'd also have to establish a legal duty to that individual and not just the general public. It would be very difficult to convince a jury of this, since there's so much bad information coming from so many different sources. And there are also First Amendment issues.

[Joinfortmill]

3. We need better regulations to force them out.

The Brits did it.