> Also past vaccine history means absolutely nothing. You can't assume the next bridge is built safely just because you have never seen a bridge fall before.
It does not mean nothing. Yes just because previous vaccines were safe does not mean the next one will be safe. However success of previous vaccines mean we have the technology to create and evaluate future safe vaccines.
Similarly, because we have a history of building bridges we know what it entails to make future safe bridges -- however the bridge could still fall if make a mistake.
It does not mean nothing. Yes just because previous vaccines were safe does not mean the next one will be safe. However success of previous vaccines mean we have the technology to create and evaluate future safe vaccines.
Similarly, because we have a history of building bridges we know what it entails to make future safe bridges -- however the bridge could still fall if make a mistake.