Since the World Health Organization first alerted the world to the existence of a mysterious group of pneumonia cases in Wuhan, China, researchers have already developed more than two hundred vaccine candidates to combat the expansion of the coronavirus SARS.CoV.2. After ten months of speedy development, the competition between the various laboratories for producing an efficacious and safe vaccine against the new coronavirus has taken a decisive turn and has resulted in a promising result.
Please find here in pdf an in-depth explanation:
By Msgr. Jacques Suaudeau, priest of the diocese of Grenoble, former Scientific Director of the Pontifical Academy for Life, Ecclesiastical Assistant of FIAMC and Doctor in Medicine.