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An important factor in achieving herd immunity against SARS-CoV-2 (the virus that causes COVID-19) is is how long the vaccines protect you. If a vaccine continues to work well over a long period, it becomes easier to have a significant proportion of the population optimally protected, and in turn suppress or eliminate the disease entirely. […]
Researchers in the United States have conducted a study showing that the humoral (antibody) immunity induced by vaccination against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) – the agent that causes coronavirus disease 2019 (COVID-19) – varies significantly among immunocompromised individuals. The findings come from an interim analysis of an ongoing observational, prospective cohort analysis […]
Long-term data from northern Italy—an area hit hard during the early days of the pandemic—suggests that reinfection after recovery from COVID-19 infection is very rare, and immunity in former patients could be long-lasting. “Natural immunity to SARS-CoV-2 appears to confer a protective effect for at least a year, which is similar to the protection reported […]
Scientists at the U.S. Department of Energy’s (DOE) Brookhaven National Laboratory and the University of Illinois Urbana-Champaign (UIUC) have developed a new mathematical model for predicting how COVID-19 spreads. This model not only accounts for individuals’ varying biological susceptibility to infection but also their levels of social activity, which naturally change over time. Using their […]
Scientists from Duke-NUS Medical School, the National Center for Infectious Diseases (NCID) and the Agency for Science, Technology and Research (A*STAR) Infectious Diseases Labs found that antibodies against SARS-CoV-2 wane at different rates, lasting for mere days in some individuals, while remaining present in others for decades. The study, published in The Lancet Microbe, shows […]
ZURICH (Reuters) – Vaccines from AstraZeneca, Russia’s Gamaleya Institute and Johnson & Johnson fight the coronavirus with another virus, leaving scientists concerned the shots may lose potency if annual inoculations become necessary to fight new variants.FILE PHOTO: A healthcare worker administers a dose of the Sputnik V coronavirus disease (COVID-19) vaccine to her colleague in […]
While PCR testing has been used widely for COVID-19 diagnosis, it only provides information on who is currently infected. Antibody testing can tell who has been previously exposed to SARS-CoV-2, the virus that causes COVID-19, a metric that is essential for tracking spread across a population. It may also, as a study recently published in […]
New research involving scientists from Queen Mary University of London has found evidence of protective immunity in people up to four months after mild or asymptomatic COVID-19. The study, published today in Science Immunology, analyzed antibody and T cell responses in 136 London healthcare workers who had mild or asymptomatic COVID-19 infection dating back to […]
Australian researchers have revealed—for the first time—that people who have been infected with the COVID-19 virus have immune memory to protect against reinfection for at least eight months. The research is the strongest evidence for the likelihood that vaccines against the virus, SARS-CoV-2, will work for long periods. Previously, many studies have shown that the […]
CDC: New airborne transmission guidance was ‘draft version’ posted by mistaken Fox News’ Steve Harrigan reports on CDC correction on coronavirus guideline. A new study suggests a mosquito-borne illness called dengue may afford some immunity against coronavirus. Researchers at Duke University analyzed factors contributing to the spread of coronavirus cases in Brazil, and found an inverse […]