Covid 19: Are there different strains of the virus or different responses to the same virus?

OK so we know that various people have different responses to Covid 19. All the way from the elderly dying to the young having mild/little symptoms. But, the question is are there elderly who also have mild symptoms and the young that get really sick? Like there are variations in strength of the virus. A weak strain and a strong strain.

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  • 2 months ago
    Favourite answer

    Genetic variation explains some of the differences in the strength of immune responses. Certain immune system genes code for proteins called human leukocyte antigens (HLA), which vary tremendously. These variations influence how well the immune system recognizes a given pathogen, or other foreign entity. An HLA type that leads to poor recognition of SARS-CoV-2 could cause a person to be more vulnerable to the virus.

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    • Sandra S.
      Lv 7
      2 months agoReport

      I'm thinking you could be right. Hopefully soon we'll know more about Covid-19 and how to proceed. Thank you Edwena!

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  • Foofa
    Lv 7
    2 months ago

    Researchers in my home state believe we here on the west coast got the direct from China strain that's apparently less fatal than the European mutation affecting the east coast. Viruses mutate, it's their survival instinct. This is why the CDC has to formulate a different flu shot every year. So surely by now there are various mutations of this. If you look at the stats on where the virus is the most toxic most of their "patient zero" tracing has tracked transmission to Italy rather than China. Most of the cases in South America have been traced to citizen tourists returning from Europe. 

    • Sandra S.
      Lv 7
      2 months agoReport

      Good answer!

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