The newly approved Johnson & Johnson COVID-19 vaccine could trigger fewer allergic reactions and help some recipients avoid headaches, sore muscles, and other adverse effects that can plague recipients who get a second inoculation shot required by Moderna or Pfizer. The Johnson & Johnson vaccine requires only one shot, as opposed to the two-step inoculation process developed by Moderna and Pfizer.
Brandon Dionne, assistant clinical professor in the department of pharmacy and health sciences. Photo by Matthew Modoono/Northeastern University