Ten-month immunity after Covid-19 infection seems strong against all variants of the coronavirus, the study found. 研究发现,感染新冠病毒10个月后,对所有冠状病毒变体的免疫力似乎都很强。 “There’s quite a long sustained...
Motivated by historical and present clinical observations, we discuss the possible unfavorable evolution of the immunity (similar to documented antibody-dependent enhancement scenarios) after a first infection with COVID-19. More precisely we ask the question of how the epidemic outcomes are affected ...
COVID-19 Can Cause Severe Inflammation in the Brain Both during and after infection with the Coronavirus SARS-CoV-2, patients may suffer from severe neurological symptoms, including anosmia, the loss of taste and smell typically associated with COVID-19. Along with direct damage caused by the v...
Detection of IgG and NAbs is not synonymous with durable immunity. With regard to COVID-19, a small, nonpeer-reviewed, preprint report provides the only data thus far on possible postinfection immunity in primates.6In this study, 4 rhesus macaques were infected with SARS-CoV-2, and followin...
There is one final reason to doubt the efficacy of infection-based herd immunity: Contracting and recovering from thecoronavirusmight not even give immunity for very long. One CDC report suggests that "people appear to become susceptible to reinfection around 90 days after onset of infection." The...
"Two months is too little time to know if it causes reinfection and how it affects long-term immunity. We saw some studies where the blood of patients who recovered from the new variant helped with Delta infection but we don't know if that will be true for future variants," she said....
Australian Nobel laureate immunologist Peter Doherty. (Photo courtesy of the Peter Doherty Institute for Infection and Immunity) It is highly improbable that people who have recovered from COVID-19 will be infected again, and even if it turns out to be the case, the secondary infection would be...
specific memory T cells, which were found up to 2 years after recovery99,100. SARS-CoV-specific CD4+T cells express IFNγ, TNF and IL-2, which suggests that patients with SARS-CoV infection exhibit a TH1 cell response and mainly use cellular immunity to control the infection101,102. ...
A closer look at the memory B cells revealed something surprising: these cells had gone through numerous rounds of mutation even after the infection resolved, and as a result the antibodies they produced were much more effective than the originals. Subsequent lab experiments showed this new set of...
On the other hand, vaccination after SARS-CoV-2 infection increased T-cell immunity, antibody-secreting memory B-cell response to the spike protein, and neutralising antibodies effectivity even after the first dose of mRNA-based vaccines (Pfizer-BioNTech or Moderna)59,60,61. While our data showe...