like, for example, if the vaccine is made from chicken eggs and a non-sterile batch gets through because we scaled up the pipelines faster than what was safe...
BTW, your 2% chance of death is assuming you catch the bug (and that the 2% figure is accurate). vs a much higher chance that you take the vaccine.
Do you prefer a 0.02 * 0.8 == 0.16 chance of blindness over a 0.02 * 0.05 == 0.001 chance of death?
Nobody knows what the real numbers are, so it is pointless to ask that question.
2% might be the overall death rate if this thing keeps coming back until eventually everybody has been infected. Or maybe it mutates to be less deadly. Maybe the hypothetical vaccine is only a .2% chance of deafness not blindness - or a 10% chance of your little toe falling off...
BTW, your 2% chance of death is assuming you catch the bug (and that the 2% figure is accurate). vs a much higher chance that you take the vaccine.
Do you prefer a 0.02 * 0.8 == 0.16 chance of blindness over a 0.02 * 0.05 == 0.001 chance of death?