Only it isn't that simple.

Pull the lever, and the lever might do things you didn't expect - like derail the last few cars. Don't pull the lever, and people die for sure.

If you derail the last car and don't try to put it back before the next train, you now suddenly have more folks that don't trust the lever and avoid all trains, not just the one you operate.

But the real risk here is that the lever will get stuck. Even if 1 person dies from vaccine - it can create huge, long-lasting case against vaccination, causing more people to choose not to vaccinate and eventually killing a lot more people.

There must be no doubts with vaccines, 100% trust in them is essential.

>It's the trolly problem. Pull the lever and kill one person. Don't pull the lever and kill 3 people. I'm a lever puller.

people are such cool "lever pullers" until that one person is themselves.