RSV Is Bad. Where's the Vaccine?

Every winter, the respiratory virus RSV lands tens of thousands of babies and young children in hospitals around the country. This year, the outbreak started early. WSJ's Denise Roland explains the challenges of creating an RSV vaccine. Further Reading: -GSK Poised for Pfizer Battle in RSV Vaccine Market-RSV Hospitalizations Surge, Babies Hit Hardest  Learn more about your ad choices. Visit megaphone.fm/adchoices