According to a Pharmaceutical Technology report, there are concerns that emergency authorized vaccines may not be particularly effective at preventing Covid-19 infections in the long-term, leading to the need for improved, next-generation vaccines against this novel coronavirus.
One pair of companies working on the next phase of vaccine development are sister biotechs NantKwest and ImmunityBio.
The First Generation of...
https://mfame.guru/scientists-working-on-next-gen-covid-vaccines-for-long-term-immunity/