Is collective immunity still possible? “We were unlucky”

Through vaccination or by being infected, one gains immunity. When many individuals are thus immune to a virus, this will constitute a barrier against the latter. This is called collective immunity.

For many months, doctors, infectious diseases and other experts have insisted that this was the solution to get out of the crisis in which the Covid-19 has entangled us. However, while more than 75% of the population is now vaccinated, the health situation has deteriorated in recent weeks to the point of forcing the Belgian government to impose new measures.