A team led by Drew Weissman of the Perelman School of Medicine is working to develop a universal coronavirus vaccine. "There have been three epidemics with coronavirus in the past 20 years. The problem with chasing variants is by the time you've made a vaccine the variant is gone and a new variant appears," he said.
https://6abc.com/universal-covid-vaccine-pa-coronavirus-university-of-pennsylvania-perelman-school-medicine-philadelphia/11565276/ ABC News