Yes.

>So, I should be forced to give blood if someone’s life is at risk and they need my blood (or, kidney)?

If that someone being in risk was the inevitable biological result of your actions, then yes. You should be forced to save him/her. Because you put him/her there.

Should men be required to donate organs to women they got pregnant, if indicated?

This is obviously very silly and not thought out. Banning abortion is just as silly.

Yes, if you can

1- Prove that I infected them

And,

2- Prove that no other solution would save the infected person, and organ donation would

>Should men be required to donate organs to women they got pregnant

Not if the impregnation was consensual. The person infected with Covid or hit by a car didn't consent to those actions, but a pregnant woman consented to impregnation unless she's raped, therefore she should accept responsibility for the associated risks. Rape is one of the very few reasons where abortion should be allowed. But it's something like 0.1% or so of abortion reasons, the vast majority of abortions are morally indefensible.