Je was op zoek naar: dynamic (Engels - Hausa)

however, it is challenging to overcome the difficulty because of the long period of time (averaged 18 months) needed for vaccine development and the dynamic variations of covs.
duk da haka, yana da ƙalubale don shawo kan wahalar saboda tsawon lokaci (aƙalla watanni 18) da ake buƙata don haɓaka maganin alurar rigakafi da bambancin canji na covs.

group dynamics
hausa