Long Covid, many studies and often conflicting conclusions. And a certainty: “A little or a lot, the vaccine protects”

The epidemiologist will succeed Ziyad Al-Aly to solve the mystery of the Long Covid to finally understand how to define it more precisely, how much vaccines protect and if the different variants carry a lower or greater risk of developing this annoying and long syndrome that affects many people after the infection? Many researchers ask this as well as public opinion given that in recent months there have been so many studies on the subject which, however, often arrive at conflicting conclusions.