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About 98 results

ALLMedicine: Sars Center

Duration of SARS-CoV-2 Natural Immunity and Protection against the Delta Variant: A Retrospective Cohort Study
https://academic.oup.com/cid/advance-article/doi/10.1093/cid/ciab999/6448857
Clinical Infectious Diseases; Kim P, .

Nov 3rd, 2021 - Infection with SARS-CoV-2 has been shown to be highly protective against reinfection and symptomatic disease. However, effectiveness against the highly transmissible Delta variant and duration of natural immunity remain unknown.

Duration of SARS-CoV-2 Natural Immunity and ...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8690283
Clinical Infectious Diseases : an Official Publication Of... Kim P, Gordon SM et. al.

Dec 6th, 2021 - Infection with SARS-CoV-2 has been shown to be highly protective against reinfection and symptomatic disease. However, effectiveness against the highly transmissible Delta variant and duration of natural immunity remain unknown. This retrospective cohort study included 325,157 patients tested for coronavirus disease 2019 (COV...

Effect of Delta variant on viral burden and vaccine effectiveness against new SARS-CoV-...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8674129
Nature Medicine; Pouwels KB, Pritchard E et. al.

Oct 16th, 2021 - The effectiveness of the BNT162b2 and ChAdOx1 vaccines against new severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections requires continuous re-evaluation, given the increasingly dominant B.1.617.2 (Delta) variant. In this study, we investigated the effectiveness of these vaccines in a l...

Past Infection May Better Protect Against Delta Than Vaccine, but …
https://www.medpagetoday.com/infectiousdisease/covid19/94258

Aug 28th, 2021 - A prior infection from COVID-19 was more protective than vaccine-induced immunity in reducing the risk of infection and symptomatic illness from the Delta variant, according to a retrospective observational study from Israel. Those who received both doses of the Pfizer/BioNTech vaccine in January or February of this year had a 13.06-fold increased risk (95% CI 8.08-2...

Omicron Reported in 57 Countries, Hospitalisations Set to Rise, WHO Says
https://www.medscape.com/viewarticle/964367

Dec 9th, 2021 - GENEVA (Reuters) - The Omicron variant has been reported in 57 nations and the number of patients needing hospitalisation is likely to rise as it spreads, the World Health Organization said on Wednesday. The WHO, in its weekly epidemiological report, said more data was needed to assess the severity of disease caused by the Omicron variant and whether its mutations might reduce ...

In COVID Battle, Omicron May Outrun Delta, Experts Say
https://www.medscape.com/viewarticle/964159

Dec 3rd, 2021 - Editor's note: Find the latest COVID-19 news and guidance in Medscape's Coronavirus Resource Center. The genetic changes found in the new Omicron variant indicate it could be passed more easily from person to person than Delta, according to the latest threat assessment from the United Kingdom's Health Security Agency, which has done some of the best and fastest characterization of corona...

Non-pharmaceutical interventions, vaccination, and the SARS-CoV-2 delta variant in Engl...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8550916
Lancet (London, England); Sonabend R, Whittles LK et. al.

Nov 1st, 2021 - England's COVID-19 roadmap out of lockdown policy set out the timeline and conditions for the stepwise lifting of non-pharmaceutical interventions (NPIs) as vaccination roll-out continued, with step one starting on March 8, 2021. In this study, we assess the roadmap, the impact of the delta (B.1.617.2) variant of SARS-CoV-2, and potential ...

Protection and Waning of Natural and Hybrid Immunity to SARS-CoV-2.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9165562
The New England Journal of Medicine; Goldberg Y, Mandel M et. al.

May 26th, 2022 - Infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) provides natural immunity against reinfection. Recent studies have shown waning of the immunity provided by the BNT162b2 vaccine. The time course of natural and hybrid immunity is unknown. Using the Israeli Ministry ...

Natural, Vaccine-Induced, and Hybrid Immunity to COVID-19
https://www.medscape.com/viewarticle/970708

Mar 22nd, 2022 - Editor's note: Find the latest COVID-19 news and guidance in Medscape's Coronavirus Resource Center. Seroprevalence surveys suggest that from the beginning of the pandemic to 2022, more than a third of the global population had been infected with SARS-CoV-2. As large numbers of people continue to be infected, the efficacy and duration of natur...

Differences in Immunological Evasion of the Delta (B.1.617.2) and Omicron (B.1.1.529) S...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9266289
International Journal of Environmental Research and Publi... Cocchio S, Zabeo F et. al.

Jul 10th, 2022 - In December 2021-January 2022 the Veneto region in Italy faced an unprecedented wave of SARS-CoV-2 infections, even though both the vaccine coverage and the number of previously infected individuals keep increasing. In this study we address the protection against the SARS-CoV-2 infection offered by natural...

How Omicron Subvariant BA.5 Became a Master of Disguise and What It Means for the Current COVID-19 Surge
https://www.clinicaladvisor.com/home/topics/infectious-diseases-information-center/omicron-subvariant-ba-5-master-disguise/

Jul 27th, 2022 - The Omicron subvariant known as BA.5 was in February 2022 and spread rapidly throughout the world. As of the second week of July 2022, BA.5 constituted . Soon after researchers in South Africa reported the on November 24, 2021, many scientists speculated that if Omicron’s numerous mutations made it either more transmissible or bette...

Risk for Reinfection After SARS-CoV-2: A Living, Rapid Review for American College of P...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8791447
Annals of Internal Medicine; Helfand M, Fiordalisi C et. al.

Jan 25th, 2022 - The strength and duration of immunity from infection with SARS-CoV-2 are important for public health planning and clinical practice. To synthesize evidence on protection against reinfection after SARS-CoV-2 infection. MEDLINE (Ovid), the World Health Organization global literature database, ClinicalTrials.gov, COVID19reviews.org, an...

COVID vaccine booster increases antibody responses, is protective in rhesus macaques
https://www.eurekalert.org/news-releases/932372

Oct 21st, 2021 - WHAT: A booster dose of the mRNA-1273 COVID-19 vaccine given to rhesus macaques about six months after their primary vaccine series significantly increased levels of neutralizing antibodies against all known SARS-CoV-2 variants of concern, according to a new study from National Institutes of Health scientists and colleagues. The study, published in Science, al...

From Delta to Omicron in 20 Days
https://www.medscape.com/viewarticle/973938

May 13th, 2022 - Editor's note: Find the latest COVID-19 news and guidance in Medscape's Coronavirus Resource Center. A group of Spanish researchers presented an interesting case report last month at the 2022 European Congress of Clinical Microbiology & Infectious Diseases (ECCMID) in Lisbon, Portugal: A 31-year-old woman who, just 20 days after testing positive for Delta, tes...

Ending Isolation and Precautions for People with COVID-19: Interim Guidance
https://www.cdc.gov/coronavirus/2019-ncov/hcp/duration-isolation.html

Jul 14th, 2022 - This page is for healthcare professionals caring for people in the community setting under isolation with laboratory-confirmed COVID-19. See Quarantine and Isolation for more information for the general population in the community. These recommendations do not apply to healthcare personnel and do not supersede state, local, tribal, or territorial laws, rules, and regulations. For healthcare set...

Understanding coronavirus variants
https://www.eurekalert.org/news-releases/927837

Sep 8th, 2021 - With the emergence of new SARS-CoV-2 variants such as beta and delta, people are not only getting a refresher course on the Greek alphabet, but also experiencing confusion and anxiety about what the variants mean for public health. A new article in Chemical & Engineering News (C&EN), the weekly newsmagazine of the American Chemical Society, asks scientists to weigh in on th...

Vaccine protection against COVID-19 short-lived, booster shots important, new study says
https://www.eurekalert.org/news-releases/959025

Jul 15th, 2022 - Since COVID-19 vaccines first became available to protect against infection and severe illness, there has been much uncertainty about how long the protection lasts, and when it might be necessary for individuals to get an additional booster shot. Now, a team of scientists led by faculty at the Yale School of Public Health and the University of North Carolina at Charlotte has an answer: strong p...

COVID-19 Cases and Hospitalizations by COVID-19 Vaccination Status and Previous COVID-1...
https://doi.org/10.15585/mmwr.mm7104e1
MMWR. Morbidity and Mortality Weekly Report; León TM, Dorabawila V et. al.

Jan 28th, 2022 - By November 30, 2021, approximately 130,781 COVID-19-associated deaths, one in six of all U.S. deaths from COVID-19, had occurred in California and New York.* COVID-19 vaccination protects against infection with SARS-CoV-2 (the virus that causes COVID-19), associated severe illness, and death (1,2); among those who survive, previous SARS-CoV...

COVID-19 Vaccines Protect the Family, Too
https://directorsblog.nih.gov/2021/10/19/covid-19-vaccines-protect-the-family-too/
NIH Director's Blog;

Oct 19th, 2021 - Any of the available COVID-19 vaccines offer remarkable personal protection against the coronavirus SARS-CoV-2. So, it also stands to reason that folks who are vaccinated will reduce the risk of spreading the virus to family members within their households. That protection is particularly important when not all family members can be immunized—as when there are...

Emerging Variants of SARS-CoV-2 And Novel Therapeutics Against Coronavirus (COVID-19)
https://www.ncbi.nlm.nih.gov/books/NBK570580/
StatPearls; Abdul Aleem, Abdul Bari Akbar Samad et. al.

Jul 18th, 2021 - COVID -19 is an acute viral illness caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). SARS-CoV-2 primarily affects the respiratory system; however, it can affect other major organ systems as well. Since the onset of the SARS-CoV-2 pandemic, multiple new variants ...