Once again, Maher sticks his foot in his mouth and gnaws on it for a while.
The most telling moment for me was when he compares vaccination to global warming and evolution; global warming and evolution, he says, are settled science (which is correct), but vaccination is not. That is not correct. Vaccination works. It’s been tested and measured and analyzed, and vaccinations save lives. It has been settled, repeatedly.
Michael Shermer has commented on RichardDawkins.net on this issue, too. Maybe someday it will sink in.