The strange reason flu shots have been so hard to improve - vox.com

The strange reason flu shots have been so hard to improve  vox.comThere’s a new flu shot for adults 50 and older. Should you get it?  San Francisco ChronicleA new flu vaccine geared to older people is coming soon  NPRThe new mRNA flu shot mFlusiva is more effective. Why doctors worry Long Islanders may not try it.  NewsdayWhat to know about the first mRNA-based flu shot approved by the FDA  The Washington Post