New blood test by French lab detects Covid-19 immunity

Normal blood tests can only detect whether a person has any antibodies to the virus - but not how effective those antibodies actually are

A French laboratory is developing a blood test that can determine exactly how immune a person is to the virus SARS-CoV-2 - which causes Covid-19 - and has hailed it “a precious tool to help with deconfinement”.

The vaccination biotech laboratory Pasteur-TheraVectys, which is based in central Paris and is a “spin off” of prestigious medical research centre l’Institut Pasteur, has been developing the test as part of the institute’s wider studies into Covid-19.

Most people who have been infected with the virus SARS-CoV-2 and subsequently recovered will have antibodies against the virus in their blood.

But the World Health Organisation (WHO) has previously said that it is not clear how immune people are to a second infection - even if they test positive for antibodies - or whether everyone who gets ...

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