Pfizer planning to submit 4th Covid shot data soon; working on variant vaccine https://www.cnbc.com/2022/03/11/pfizer-planning-to-submit-data-on-4th-covid-shot-soon-while-working-on-vaccine-for-all-variants.html?__source=androidappshare

Pfizer planning to submit 4th Covid shot data soon; working on variant vaccine https://www.cnbc.com/2022/03/11/pfizer-planning-to-submit-data-on-4th-covid-shot-soon-while-working-on-vaccine-for-all-variants.html?__source=androidappshare