BNTX BioNTech SE

By Matt Grossman

Pfizer Inc. has enrolled the first subjects in a study testing the coadministration of the company's Covid-19 booster shot along with Pfizer's 20-valent pneumococcal conjugate vaccine.

The study, which includes 600 people age 65 or older, will study the safety of giving the two shots together. Some people in the study will get both shots, while others will get just one of the two vaccines plus a placebo.

The trial's subjects were recruited from the cohort that participated in Pfizer's Phase 3 trial for its Covid-19 vaccine last year.

Pfizer developed its Covid-19 vaccine with BioNTech SE.

Write to Matt Grossman at matt.grossman@wsj.com

(END) Dow Jones Newswires

May 24, 2021 07:07 ET (11:07 GMT)

Copyright (c) 2021 Dow Jones & Company, Inc.