Doctor discusses Biden's COVID-19 plan and latest vaccine guidance

As President Biden signed executive orders to ramp up federal efforts to fight the coronavirus pandemic, the World Health Organization is updating its guidance on how to interpret COVID-19 test results. Dr. Bob Lahita spoke with CBSN's Anne-Marie Green and Vladimir Duthiers to break down the latest guidance, and what the CDC says to do if you can't get your second shot of the vaccine on time.