Israelis who had an infection were more protected against the Delta coronavirus variant than those who had an already highly effective COVID-19 vaccine The natural immune protection that develops after a SARS-CoV-2 infection offers considerably more of a shield against the Delta variant of the pandemic coronavirus than two doses of the Pfizer-BioNTech vaccine, according…
Tag: Innate Immunity
Cell Reports Medicine reports “Longitudinal analysis shows durable and broad immune memory after SARS-CoV-2 infection with persisting antibody responses and memory B and T cells”
Ending the COVID-19 pandemic will require long-lived immunity to SARS-CoV-2. Here, we evaluate 254 COVID-19 patients longitudinally up to 8 months and find durable broad-based immune responses. SARS-CoV-2 spike binding and neutralizing antibodies exhibit a bi-phasic decay with an extended half-life of >200 days suggesting the generation of longer-lived plasma cells. SARS-CoV-2 infection also boosts antibody titers…
Wall Street Journal reports “We’ll Have Herd Immunity by April”
Covid cases have dropped 77% in six weeks. Experts should level with the public about the good news. Amid the dire Covid warnings, one crucial fact has been largely ignored: Cases are down 77% over the past six weeks. If a medication slashed cases by 77%, we’d call it a miracle pill. Why is the…
AIMSIB reports “COVID serious, admit the existence of facilitating antibodies”
The phenomenon of facilitating viral infections by antibodies exists for many viruses including coronaviruses. Instead of behaving as described by classical immunology (protective effect), antibodies allow the virus to penetrate target cells more easily. This mechanism could make a future vaccine against Covid-19 dangerous: this effect was demonstrated in animal tests with SARS1 vaccine candidates…