There are some slight differences and some similarities between two pharmaceutical companies producing the vaccine against COVID-19. Those companies, Moderna and Pfizer, have shipped out limited supplies of vaccines to hospitals and clinics who registered to receive them. Pfizer was the first to supply 109 Texas medical facilities with vaccine. It is the Moderna vaccine which Medical Arts Hospital (MAH) has received to administer to its staff and to members of the public who qualify under state guidelines. Currently the vaccine is allowed for people in what is labeled Tier 1B. The group includes those who are 65 and older, or are ...