Cross-immunity is said to be the reason why some do not become infected with Sars-CoV-2 even after close contact with infected people.
the essentials in brief
- The cross immunity is intended to protect against infection with Sars-CoV-2.
- “Normal” corona viruses are said to be the reason that Sars-CoV-2 does not affect everyone.
One hears again and again that in families or partnerships affected by Covid-19 some people do not get sick. Scientists from the UK have now found laboratory evidence of the most likely cause.
It is said to be a cross-immunity of the persistently “healthy”, crossed with the Covid-19 pathogens. These come from a previous infection with “normal” coronaviruses.
T cells seem to play an important role in this cross-immunity. These are said to have formed in response to an infection with human corona cold viruses (huCoVs). Because Corona is not something completely new. At least four coronavirus species have been circulating in mankind for a long time as causative agents of seasonal common colds.
Cross immunity protects against Sars CoV-2 infection
The hypothesis is not new. However, so far there has been a lack of convincing evidence, which has now been provided by scientists working with Rhia Kundu from Imperial College London. This was what it said on Tuesday in the German “Pharmazeutische Zeitung”. The scientists published their results on Monday in “Nature Communications”.
The scientists had already carried out studies since September 2020, when very few people in England were still suffering from Covid-19.
Ajit Lalvani, the study’s senior author and director at Imperial College London, was quoted as saying. “Our study provides the clearest evidence to date that T cells have a protective function against a Sars-CoV-2 infection. These are caused by cold coronaviruses. These T cells offer protection by attacking proteins inside the virus and not the spike protein on the virus surface. “
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