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 Immunity after SARS-CoV-2 infections T cell responses probably play important roles in the control of SARS-CoV-2 infection, but they have been relatively understudied. Data now suggest that the majority of infected individuals develop robust and long-lasting T cell immunity, which has ...
Other factors also increase your vulnerability to reinfection, starting with how long it has been since you had Covid. Immune defenses tend to wane after an infection. A study published in October 2021 estimated that reinfection could occur as soon as 3 months after contracting Covid-19. While...
COVID-19 vaccine-induced antibody and T-cell responses in immunosuppressed patients with inflammatory bowel disease after the third vaccine dose (VIP): a multicentre, prospective, case-control study 09-08, doi: 10.1016/S2468-1253...
Nicolelis said his team came across the dengue discovery by accident, during a study focused on how COVID-19 had spread through Brazil, in which they found that highways played a major role in the distribution of cases across the country. After identifying certain...
Hybrid immunity provides better protection against COVID-19 than vaccination or prior natural infection alone. It induces high magnitude and broadly cross-reactive neutralising anti-Spike IgG antibodies. However, it is not clear how long these potent antibodies last, especially in the context of adeno...
et al. Galectin-3 as a potential prognostic biomarker of severe COVID-19 in SARS-CoV-2 infected patients. Sci. Rep. 12, 1856 (2022). CAS PubMed PubMed Central Google Scholar Bozorgmehr, N. et al. Galectin-9, a player in cytokine release syndrome and a surrogate diagnostic biomarker ...
development of herd immunity could also provide a defense against COVID-19. However, whether immunity occurs among individuals after they have recovered from COVID-19 is uncertain. Many human infections with other viral pathogens, such as influenza virus, do not produce a durable immune response....
Where does that leave us as far as COVID-19 lockdowns are concerned? Those who oppose lockdowns should be glad to see that Sweden and many other places may soon be “COVID-free.” But invoking herd immunity as an explanation, persuasive as the biology may be, could be premature. Argu...
In a survey carried out between 27 April and 11 May and involving more than 61000 participants in nearly 36000 households, Marina Poll谩n, professor at Spain's National Centre for Epidemiology in Madrid, with colleagues from the ENE-COVID study group, used two methods to detect anti-covid-...