COVID SCIENCE Vaccine response may be weaker in the elderly; Merck medicine shows promise in reducing virus level
US coronavirus: reducing Covid-19 cases is the best thing the US can do to improve the chances of vaccines continuing to work, says expert
/cloudfront-us-east-1.images.arcpublishing.com/dmn/T7HJTRTEW5CNDNWT3E3HCTCICM.JPG "Dallas County reports 19 coronavirus deaths and 228 cases, reducing threat level to ‘moderate risk’")
