With more than 161 million people now fully vaccinated in the U.S., experts say we are bound to see reports of breakthrough infections, meaning people test positive for COVID-19 while fully vaccinated. These breakthrough COVID-19 cases aren’t proof the vaccines aren’t working, experts said, but are normal and expected. All evidence suggests that even in the face of the new, highly-transmissible delta variant, COVID vaccines are still working as they should to dramatically decrease the risk of hospitalization and death. “When you hear about a breakthrough infection, that doesn’t necessarily mean the vaccine is failing,” Dr. Anthony Fauci, director of the U.S. National Institute of Allergy and Infectious Diseases, said before Congress on Tuesday. To read the full story.