top cx logo
cx logo
Explorearrow down
search icon
arrow down

Covid-19 France: patients still immune a month later

Several patients are still immune one month after contracting Covid-19, a new study from the Pasteur Institute shows.

The study, carried out in association with the hospital of Strasbourg, was conducted on 160 volunteers working at the hospital who have had mild forms of the virus and did not need hospitalisation. It found that 159 of them are still immune.

Pasteur Institute professor, Arnaud Fontanet told France Inter: “Antibodies were found in almost all of the patients.” 

Antibodies were detected 15 days after the infection, and for 98% of the patients, these protective antibodies were still present after 28 days.

The presence of antibodies was measured by two techniques, a rapid diagnostic test and a test developed by the Institut Pasteur (called S-Flow).

Professor Fontanet added: “We were looking for neutralising antibodies that we know are protective against reinfection for example. And here, after one month, they are found in 98% of people who had been infected with the virus."

Researchers knew that people with severe forms of the disease develop antibodies within 15 days but it was not known what proportion of patients with mild forms of the disease develop antibodies - and if these antibodies were protective - until now.

Having these protective antibodies a month after being infected means people are probably protected against reinfection if they are exposed to the virus again, said Professor Fontanet.

Head of the virology department of Strasbourg hospital, Samira Fafi-Kremer said: “These results are also good news for future vaccine strategies.”

However, it is not known yet how long the protection lasts. Researchers estimate that it can last “from a few weeks to a few months.”

New tests will be done by the institute to determine more on this.

Stay informed:
Sign up to our free weekly e-newsletter
Subscribe to access all our online articles and receive our printed monthly newspaper The Connexion at your home. News analysis, features and practical help for English-speakers in France

Resident or second-home owner in France?
Benefit from our daily digest of headlines and how-to's to help you make the most of life in France
By joining the newsletter, you agree to our Terms & Conditions and Privacy Policy
See more popular articles
The Connexion Help Guides
featured helpguide
Income Tax in France 2022 (for 2021 income)*
Featured Help Guide
- Primarily aimed at Britons, covers pensions, rent, ISAs, shares, savings and interest - Overview of online declarations + step-by-step guide to the French printed forms - Includes updates given automatically after this year's site opened
Get news, views and information from France
You have 2 free subscriber articles left
Subscribe now to read unlimited articles and exclusive content
Already a subscriber? Log in now