Yes, in order to save tens of millions of lives globally - which is exactly what happened. You really don't want to discourage that. But leaving aside pragmati

Yes, in order to save tens of millions of lives globally - which is exactly what happened. You really don't want to discourage that. But leaving aside pragmatics, you're assuming that the manufacturers wouldn't be liable. If they'd e.g. hid bad results from some study, they'd presumably still be criminally liable.