moderna inc nasdaq mrna is trading lower wednesday after denmark paused use of the companys covid19 vaccine for people under 18 years of age sweden also paused use of the vaccine for people born in 1991 and later denmark and sweden now recommend individuals in the younger age group opt for the comirnaty vaccine from pfizer inc nyse pfe and biontech se nasdaq bntx instead moderna is a pharmaceutical and biotechnology company focused on vaccine technologies based on mrna its mrna technology was rapidly validated with its covid19 vaccine which was authorized in the united states in december 2020 see also why this investor keeps buying moderna shares as the stock falls mrna price action moderna has traded as high as 49749 and as low as 6548 over a 52week period the stock was down 49 at 31571 at time of publication