> The two samples were divergent enough that it seemed highly improbable that vaccinia, the current smallpox vaccine, was descended from cowpox. This left Downie and his colleagues with an unsettling question: What on earth had they been injecting into the arms of millions of people for the past 150 years?
1 comment
[ 2.8 ms ] story [ 15.0 ms ] thread> The two samples were divergent enough that it seemed highly improbable that vaccinia, the current smallpox vaccine, was descended from cowpox. This left Downie and his colleagues with an unsettling question: What on earth had they been injecting into the arms of millions of people for the past 150 years?