Tabitha M. Powledge examines a shift in the never-ending debate over vaccines and autism, as evidenced by Wednesday night's Republican candidate debate: "So the argument is moving on from the (relatively) simple and bogus claim that the MMR vaccine causes autism to a more complex and on its surface not implausible claim: that a great number of inoculations in a short time can overwhelm an infant immune system." The evidence does not support that view either, she writes.
September 19, 2015
.png)
