There are a lot of reasons to be positive about the recovery from the coronavirus pandemic as vaccines start to be rolled out around the world. In the meantime though, the virus is still spreading and there's news about a few notable mutations in different countries. One mutation was found in South Africa, while another highly contagious strain of the virus emerged in the UK and now is being found all over. So what does this mean? How concerned should we be? And are the vaccines we have now still effective against these mutations? Dr. Zachary Klase, PhD, Associate Professor in Pharmacology and Physiology at Drexel University’s College of Medicine joins KYW Newsradio In Depth to answer all our questions about the different strains of coronavirus popping up all over the globe.

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