Vaccine makers work to take on coronavirus variants

Johnson and Johnson has reported promising results from its single-dose coronavirus vaccine and plans to apply for emergency use authorization in early February. Meanwhile, the virus variant first identified in South Africa has now been found in the United States. CBS News' Mola Lenghi reports, and Dr. Bob Lahita spoke with CBSN's Anne-Marie Green and Vladimir Duthiers about the highly contagious new strain and the work drugmakers are doing to fight variants that continue to appear.