Testing all French people to find out if they are carriers of the coronavirus would be "impossible" and "has no medical sense," said Health Minister Olivier Véran on Saturday, reaffirming the "priority" given to patient screening.

"We will test 60 million French people every day? It is impossible, no country in the world does it," said the Minister of Health on Saturday, explaining on the one hand that the current testing capacities for the covid-19 were not sufficient and that, on the other hand, a negative virological test on a given day did not prevent being infected without knowing it the next day.

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"An all-round screening of everyone in a company one morning [...] it makes no medical and scientific sense," he insisted, while some companies like Veolia announced their intention to subject their employees to screening tests when they resume their activity, after the deconfinement announced for May 11. Olivier Véran also stressed that these tests constituted "a medical examination which cannot be imposed" by the employer but which must be done on "medical prescription".

The minister was speaking at the Maison de la solidarité in Saint-Denis, after having visited a private biology laboratory in the same commune, on the edge of Paris, which has adapted its activity to greatly increase its screening test capacities for covid-19.

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Test all suspicious cases during deconfinement

Currently, "we have exceeded 50,000" tests per day at the national level, assured Olivier Véran, the objective being "to carry out at least 500,000 to 700,000 tests per week from the moment when we gradually lift the confinement". The "national priority" will then be to test all suspect cases, people with symptoms, and people who have been in close contact with confirmed cases of coronavirus, he said. "If we then see that we are not saturated in testing capacity and that we can broaden the criteria, we will do so gradually," he said.

In the meantime, to "limit as much as possible" the circulation of the virus by asymptomatic people, the government is relying on the extension of "social distancing" measures and the carrying out of random tests for the purpose of epidemiological surveillance.

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Several models of serological tests are also "being calibrated and validated by the health authorities", he also recalled, hoping to have validated some "next week". These blood tests tell whether a person has been infected with the virus, whether or not they have had symptoms, and the level of antibody developed that offers potential immunity.