Danish researcher working on Covid-19 vaccine (illustration) - Thibault Savary / AFP) - AFP

A fear in awe. While according to figures (arrested Monday, March 30, 2020) from the Ministry of Solidarity and Health, in France, 44,500 people contracted the coronavirus, 3,024 died from it and 7,924 were able to return home, cured, many readers from 20 Minutes wonder if it is possible to catch the Covid-19 a second time. Others are trying to find out if a drug or vaccine is already in place to avoid being contaminated:

"Once a person has been sick and cured of the coronavirus, is he immune? Or can she catch it a second time? Do the tests allow us to detect that we have been sick, and therefore cured? »Marie

"If you are cured of Covid-19, can you be infected again?" »SaSI

"Are we immune when we have already contracted the virus like a vaccine (we have antibodies)?" »Begu

"Does vaccination against pneumococcus protect against coronavirus? »Sylvie

"I have used Nivaquine [an antimalarial] for more than two years (like many people who have stayed abroad), do you think I could be a little immune? »River

Here are the answers that 20 Minutes found:

A glimmer of hope. According to Italian researchers specializing in infectious diseases, "Covid-19 would mutate very little, with only five new variants," reports Le Point , who sees two positive consequences: this weak mutation would not affect the stability of the vaccine over time , and it could protect against further contamination, the body having antibodies capable of acting as a barrier to the virus.

Encouraging tests on animals. “This is a hypothesis, confirms to 20 Minutes Jean Dubuisson, CNRS researcher at the Center for Infection and Immunity of Lille, specializing in the life cycle of human coronaviruses and the host-pathogen relationship. Tests were carried out on animals which had already been infected and to which the virus was reinjected. As a result, they did not develop the symptoms. "However, we should not claim victory, insists Jean Dubuisson. First of all because "we don't have enough perspective to know the duration of this immunoprotection". Secondly, because it will “be necessary to carry out serological tests [on blood samples] on humans to verify the presence or absence of antibodies to the coronavirus. "

Admittedly, “tests are being developed”, continues the researcher. But the game will not be won immediately: “The big challenge will be to develop them on a large scale, that is to say to be able to produce them in industrial quantities, then to carry them out on a large part of the population. "

No medication currently exists. In the meantime, faced with the “killer monster” that is Covid-19, “no drug in the world has proven its effectiveness,” said Professor Jérôme Salomon, Director General of Health, on Monday. What the WHO confirms: "Certain Western, traditional or domestic remedies can bring comfort and relieve the symptoms of the coronavirus, but nothing proves that the current drugs make it possible to prevent or cure the disease. "

Thus, vaccines against pneumonia, such as the pneumococcal vaccine and the anti-Haemophilus influenza type B (Hib), do not confer protection against the new coronavirus, specifies the agency of the United Nations. Furthermore, Covid-19 is a virus, therefore antibiotics (which are prescribed to fight bacteria) should not be used as a means of prevention or treatment - however, if you are hospitalized for infection with the Covid-19, you may be given antibiotics because bacterial coinfection is possible. More generally, Prof. Solomon and WHO recommend not to practice self-medication, which can do worse than better.

The US just signed a $ 450 million coronavirus vaccine contract with Johnson & Johnson https://t.co/B8H9LWlnav pic.twitter.com/bkb3bnPYha

- Forbes (@Forbes) March 30, 2020

A vaccine coming available next year? Researchers around the world are working on a vaccine against Covid-19. Pharmaceutical company Johnson & Johnson announced on Monday that it has selected a vaccine candidate to be tested on humans by September and could be ready for emergency use by early next year. In France, "clinical trials with BCG [the tuberculosis vaccine] to see if it can fight against the most severe forms of Covid-19 are underway," notes Jean Dubuisson. If this hypothesis holds true, "it could explain why the youngest, who have been vaccinated more recently, are statistically less affected by Covid-19 and its most dangerous forms," ​​relays the Huffington Post .

Our file on the coronavirus

In any case, reminds the Ministry of the Interior on its site, "the compulsory nature or not of a possible vaccine will be decided according to the results of clinical studies as well as epidemiological data".

So that you can see more clearly, 20 Minutes is trying to answer your questions, which you can send us by following the procedure below. Thank you in advance (and take care of yourself)!

  • Coronavirus
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