Spallanzani to start tests on combining different vaccines :

Trial involving 600 volunteers who had 1st dose of AstraZeneca

Related Keywords

Alessio Damato , Francesco Vaia , Pfizer , Lazio Regional Health , Astrazeneca , Health Director Francesco Vaia , Lazio Regional Health Chief Alessiod Amato , Alessio டமாட்டோ , ஃபைசர் , லேஸியோ பிராந்திய ஆரோக்கியம் ,