CDC warns of shingles vaccine shortage
The CDC is warning about a shortage of the newest shingles vaccine. Shingrix was recommended for people 50 and older beginning last fall and is more effective than the old vaccine at preventing the painful shingles virus. The demand has been greater than expected and many patients are having trouble getting the shot. Dr. David Agus joins "CBS This Morning" to discuss why the vaccine is so important for many Americans and what's behind the shortage.