Immunologists have raced to work out how to protect against multiple variants of SARS-CoV-2. Their research has yielded a wealth of insights and a few surprises.
With that decline came a drop in protection. The shots, which became widely available in some countries as early as December 2020, showed impressive effectiveness initially. But by July 2021, reports began to surface of breakthrough infections. Data from Israel, which had launched an aggressive vaccination campaign using the Pfizer–BioNTech mRNA vaccine, suggested that this vaccine’s protection against infection dropped from 95% to just 39% over the course of 5 months .
. But vaccines have retained their ability to prevent serious illness. Protection from infection might be waning, but protection against hospitalization seems to be holding up. “You’re probably going to have protective immunity for years,” Crotty says.Immune memory depends on more than just antibodies. Even when antibody levels drop, memory B cells can recognize a return invader, divide, and quickly start churning out antibodies to fight it.
Norge Siste Nytt, Norge Overskrifter
Similar News:Du kan også lese nyheter som ligner på denne som vi har samlet inn fra andre nyhetskilder.
What the Omicron wave is revealing about human immunityImmunologists have raced to work out how to protect against multiple variants of SARS-CoV-2. Their research has yielded a wealth of insights and a few surprises.
Les mer »
Deer in New York Test Positive for Omicron, Researchers Warn of Future 'Spillback to Humans'Many wild deer in Staten Island have been infected by the coronavirus, and some have even recently caught Omicron.
Les mer »
Evidence Builds That U.S. Omicron Wave Is Waning as Cases and Hospitalizations FallA downturn in recorded Covid-19 infections and hospitalizations continued over the weekend and deaths of people diagnosed with the disease appear to have stopped climbing.
Les mer »
Opinion | Covid Patients Suffer as the Biden Administration Tries to Practice MedicineFrom WSJopinion: Washington bureaucrats’ micromanagement of Covid-19 treatments that are safe and effective in varying circumstances has to stop, writes Joel Zinberg
Les mer »