Most U.S. Infections Caused By Variant; Six States Have The Most Variant

 Most U.S. Infections Are Now Caused By A contagious New Vrius Variant, The C.D.C. Says by Sheryl Gay Stolberg.  The New York Times.  April 7, 2021.  

Potential Animal Species Host For Coronavirus Now Includes Mice; Mutations Need To Be Monitored To Identify Potential New Hosts

 Virus Variants Can Infect Mice, Scientists Report by Apoorva Mandavilli.  The New York Times.  March 31, 2021.