GlaxoSmithKline (NYSE:GSK) received permission from FDA to expand the use of its Shingrinx shingles vaccine to include immunocompromised and immunosuppressed adults 18 years old or older. Having won initial FDA approval in 2017 for individuals 50 and older, the shingles (herpes zoster) vaccine is a non-live, recombinant subunit adjuvanted vaccine. Shingrix is the first shingles…