The climate comparison is a good one because it suffers from the same problem:

While few could reasonably deny that the climate IS changing, its causes are complex and multiple, and there is no certainty around the extent of human contribution, or what the outcome will be. It is heavily politicized on both sides - so the information we have is hard to understand, often contradictory, frequently manipulated and oversimplified, which leads many to conclude that it's untrustworthy.

Absent being part of a collective which concludes that there is no problem at all (which is, by most reckonings, crazy), most people simply ignore the headlines and recycle more.

The science might be complicated but the response might be perfectly simple:

Use less stuff.

Ditto covid-19, a little-understood, strange and novel illness with no vaccine and no cure. We don't know if it is wildly over- or underreported or whether it is very or only moderately dangerous, akin to driving a car.

There is vested interest from politicians, from pharmaceutical companies, and from businesses keen to avoid economic calamity (though, as Sweden found, the economy suffers regardless).

Again, the solution is simple:

Go out less and stay away from other people.