US President Joe Biden encourages parents on Wednesday to get their children Covid-19 vaccines right away. Now authorized for kids 12 and older, dismissing their low risk of serious illness in the hope of stopping its spread to more vulnerable age groups. Munia Iffat reports After a CDC panel has voted to recommend use of Pfizer-BioNTech's Covid-19 vaccine in 12- to 15-year-olds. On...