Pfizer 2-Dose Trial Didn’t Work in Kids 2-5 – Gadget Clock Pfizer 2-Dose Trial Didn’t Work in Kids 2-5 – Gadget Clock Pfizer said Friday an early analysis showed a two-dose regime of its COVID vaccine wasn't effective for so... https://www.gadgetclock.com/pfizer-2-dose-trial-didnt-work-in-kids-2-5-gadget-clock/?feed_id=405936&_unique_id=61bcf0adbdf7e https://www.gadgetclock.com/pfizer-2-dose-trial-didnt-work-in-kids-2-5-gadget-clock/?feed_id=405936&_unique_id=61bcf0adbdf7e https://www.gadgetclock.com/pfizer-2-dose-trial-didnt-work-in-kids-2-5-gadget-clock/?feed_id=405936&_unique_id=61bcf0adbdf7e