Vaccine-resistant pertussis strains found in Philadelphia http://www.pediatricnews.com/news/conference-news/pediatric-academic-societies/single-article-2013/vaccine-resistant-pertussis-strains-found-in-philadelphia/401f907a7d056b3e33bed149d60afd93.html …
12:04 PM - 16 May 2013
0 replies
1 retweet
0 likes
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.