It will not be a walk on the red carpet that will lead to a magic injection against covid. The interruption for a week of the trials of the experimental vaccine at the University of Oxford, after detecting a suspicious inflammation of the spinal cord in a vaccinated woman, has recalled that the road back to normal life is rocky. Many things can still go wrong. And the incident has also shown the hysteria that can be generated by following the development of experimental vaccines in almost real time. In July, the same Oxford essay was paralyzed after another participant was diagnosed with multiple sclerosis after receiving a vaccine. The tests were resumed in a few days when it was ruled that it was a coincidence. The case did not make it to the press and no one was alarmed.