Peter Marks (Jim Lo Scalzo/Pool via AP Images)

FDA au­tho­rizes mR­NA boost­ers from Pfiz­er, Mod­er­na for all adults 6 months af­ter vac­ci­na­tion

All US adults who re­ceived two dos­es of an mR­NA Covid-19 vac­cine are now el­i­gi­ble for a boost­er shot, the FDA an­nounced Fri­day.

The moves will amend the ex­ist­ing EUAs for the Pfiz­er/BioN­Tech and Mod­er­na boost­ers, which had pre­vi­ous­ly been lim­it­ed to im­muno­com­pro­mised in­di­vid­u­als, those old­er than 65 and adults at high risk for se­vere dis­ease through cer­tain co­mor­bidi­ties or oc­cu­pa­tion­al ex­po­sure. For Mod­er­na in par­tic­u­lar, the boost­er shots come in a half-dose of the orig­i­nal vac­cine se­ries — 50 µg in­stead of 100 µg — while Pfiz­er’s re­mains at 30 µg for each shot.

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