[ad_1] <br>New COVID variant NB.1.8.1 detected by Stanford as US limits vaccines San Francisco Chronicle <br>[ad_2] <br>Copyright for syndicated content belongs to the linked <b><a href="https://news.google.com/rss/articles/CBMijwFBVV95cUxPNFVMVVp5UXlLVkp4ZFFBT1RLVjNWdm82VW1LS0c3X0NQLTVKMjhMQUlxUGFsX3ItUVEyRGR6SUgzeVVOMkFWNDVlZ1JpWldvUEowU2dpTkozeEZoTHB2d0lhbW16Z0tac2ZmRW9WYWtQZ1h1WDJOOFpNSXQ5czFaeVR1bXRvTDZxRElSMnFtaw?oc=5" target="_blank">Source link</a></b>