Covid-19 vaccine is crucial in the fight against delta variant ...Middle East

As someone who studies immune responses to respiratory infections, I’ve watched news of the emerging coronavirus variants with concern. I wondered whether vaccination or previous infection would provide protection against SARS-CoV-2 strains, especially the new, highly transmissible delta variant, which has rapidly spread to at least 70 countries.A person can develop immunity—the ability to resist infection—in two ways: either after being infected with a virus or by getting vaccinated. However, immune protection isn’t always equal. Vaccine immunity and natural immunity for SARS–CoV–2 can differ in terms of the strength of the immune response or the length of time that the protection lasts. Ad

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