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NEWS 02 February 2023 How quickly does COVID immunity fade? What scientists know


03 Feb 2023

Three years into the pandemic, the immune systems of the vast majority of humans have learnt to recognize SARS-CoV-2 through vaccination, infection or, in many cases, both. But just how quickly do these types of immunity fade? New evidence suggests that ‘hybrid’ immunity, the result of both vaccination and a bout of COVID-19, can provide partial protection against reinfection for at least eight months1. It also offers greater than 95% protection against severe disease or hospitalization for between six months and a year after an infection or vaccination, according to estimates from a meta-analysis2. Immunity acquired by booster vaccination alone seems to fade somewhat faster.


Experimental mRNA Vaccine May Protect Against All 20 Influenza Virus Subtypes


06 Dec 2022

Flu season is now upon us, and protecting yourself and your loved ones is still as easy as heading to the nearest pharmacy for your annual flu shot. These vaccines are formulated each year to protect against up to four circulating strains of influenza virus, and they generally do a good job. What they can’t do is prevent future outbreaks of more novel flu viruses that occasionally spill over from other species into humans, thereby avoiding a future influenza pandemic.


Researchers Discover Potential New Antiviral Against COVID-19


30 Nov 2022

What you need to know Antivirals are medications that can help your body fight off viruses, including SARS-CoV-2, the virus that causes COVID-19. They work by preventing the virus from infecting healthy cells, which helps your immune system fight off infection. But viruses like SARS-CoV-2 can mutate, and antivirals may not be effective against viral variants. In a study supported by several NIH Institutes and Centers, researchers used an animal model to identify a drug that can stop SARS-CoV-2 from entering healthy cells in a way that viral variants won’t be able to evade. If it is safe and effective for humans, it may become another powerful tool in the fight against COVID-19, especially as new viral variants arise.


Study Shows Benefits of COVID-19 Vaccines and Boosters


18 Oct 2022

As colder temperatures settle in and people spend more time gathered indoors, cases of COVID-19 and other respiratory illnesses almost certainly will rise. That’s why, along with scheduling your annual flu shot, it’s now recommended that those age 5 and up should get an updated COVID-19 booster shot [1,2]. Not only will these new boosters guard against the original strain of the coronavirus that started the pandemic, they will heighten your immunity to the Omicron variant and several of the subvariants that continue to circulate in the U.S. with devastating effects.


F.D.A. Authorizes Updated Covid Booster Shots for Children 5 to 11


12 Oct 2022

Federal regulators on Wednesday broadened access to updated coronavirus booster shots to include children as young as 5, hoping to bolster protection against the now-dominant version of the virus.




Articles


Pfizer Vaccine Appears to Work Against Variant, Research Shows


08 Jan 2021

Laboratory experiments indicate the Pfizer/BioNTech vaccine will offer protection against the two coronavirus variants found in the United Kingdom and South Africa.




COVID Likely the Third-Leading Cause of Death in US, CDC Says


07 Jan 2021

COVID-19 was probably the third leading cause of death in the United States during 2020, CNN reported, citing an email from statisticians with the U.S. Centers for Disease Control and Prevention.




Moderna CEO: Vaccine Will Likely Work for 'a Couple of Years'


07 Jan 2021

The Moderna vaccine ― one of two vaccines now being distributed in the United States ― will "potentially" provide protection against COVID-19 for several years, the biotech company's CEO said, according to Reuters.




Over Half of COVID Transmission May Occur via Asymptomatic People


07 Jan 2021

As COVID-19 cases surge and vaccinations lag, health authorities continue to seek additional ways to mitigate the spread of the novel coronavirus.




SARS-CoV-2 Transmission From People Without COVID-19 Symptoms


07 Jan 2021

IMPORTANCE Severeacuterespiratorysyndromecoronavirus2(SARS-CoV-2),theetiologyof coronavirus disease 2019 (COVID-19), is readily transmitted person to person. Optimal control of COVID-19 depends on directing resources and health messaging to mitigation efforts that are most likely to prevent transmission, but the relative importance of such measures has been disputed.




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