Experts say COVID-19 vaccines may be less effective on some variants RELATED: Hospital housekeepers are COVID unsung heroes https://youtu.be/odnCUfbwn-Q COVID-19 variants are surging in America and scientists are learning the vaccine may not work as well against them. » Subscribe to USA TODAY: http://bit.ly/1xa3XAh » Watch more on this and other topics from USA TODAY: https://bit.ly/3jQY9Mx » USA TODAY delivers current local and national news, sports, entertainment, finance, technology, and more through award-winning journalism, photos, videos and VR.