47514193: @MAtty_K Why are we having this record-breaking epidemic with record high levels of pertussis vaccination? Why isn't the vaccine working?
67702044: A mass polio vaccination campaign targets over three million children in Southern Sudan  http://bit.ly/hsUQ0Q
21695622: @nocompulsoryvac @MAtty_K The idea of "record high levels of pertussis vaccination" is inaccurate. In many places it's very low.