' Very often , at our next session with patti we can 't remember what we were getting so worked up about , ' mr. richards says .
理查德说，“有很多时候，在我们跟帕蒂见面的时候，我们都记不起来当时是什么话题让我们如此激动”。
Patti e. gravitt , a johns hopkins university associate professor of epidemiology , said many families were cautious about the safety of new vaccines .
