Our Immune Systems have a long memory

The fact that the majority of populations infected with Sars-CoV-2 do not show noticeable symptoms could be due to the good memory of our immune system, according to several independent studies, two of which are published in the journal Nature . This work, carried out in Singapore, Germany, the Netherlands or the United States, found that the immune system of 10% to 50% of people who have never been in contact with the virus was able to recognize it.