COVID-19: One vaccine would be sufficient to combat global infections, says study


Washington: Genetic evaluation of sequences from greater than 27,000 people contaminated with the coronavirus that causes COVID-19 reveals that the virus has mutated minimally since December 2019, suggesting one vaccine would be sufficient to combat global infections.

The study was carried out by a crew of scientists from the Walter Reed Army Institute of Research led by Morgane Rolland, chief of viral genetics and techniques serology for the WRAIR Military HIV Research Program and Dr Kayvon Modjarrad, director of the institute`s Emerging Infectious Diseases Program. 

A manuscript detailing the findings was printed in Proceedings of the National Academy of Sciences. To characterise SARS-CoV-2 coronavirus diversification because the starting of the pandemic they aligned 18,514 unbiased virus genome sequences sampled from people in 84 international locations and scanned them for variations. 

Analyses reveal low estimates of genetic differentiation following the preliminary outbreak and point out that, thus far, the SARS-CoV-2 genome has advanced by a largely random course of slightly than by adaptation to the human hosts it encounters.

“Like other reports, we noticed that the D614G mutation in the Spike has rapidly increased in frequency since the beginning of the epidemic, but we could not link this mutation to specific adaptive forces,” mentioned Rolland. 

“When viruses replicate and spread in the population, we expect to see some mutations and some can become fixed very rapidly in an epidemic just by random chance,” Rolland famous that linking genotypes to phenotypes is sophisticated and extra analysis is required to absolutely perceive the useful penalties of the D614G mutation in SARS-CoV-2.

Given the low stage of genetic variation, a promising vaccine candidate would probably be equally efficacious towards all at present circulating strains of the COVID-19 coronavirus. “Viral diversity has challenged vaccine development efforts for other viruses such as HIV, influenza, and dengue, but global samples show SARS-CoV-2 to be less diverse than these viruses,” mentioned Rolland.

“We can therefore be cautiously optimistic that viral diversity should not be an obstacle for the development of a broadly protective vaccine against COVID-19 infection.” Modjarrad co-leads the institute`s COVID-19 response efforts, together with the event of a vaccine towards COVID-19. 

WRAIR`s main vaccine candidate is constructed on a Spike Ferritin Nanoparticle platform and is predicted to enter human testing earlier than 2021. The vaccine is paired with a proprietary adjuvant that was additionally developed at WRAIR, the Army Liposome Formulation, to additional increase the immune response.

“Scientists are working hard to accelerate the development of a COVID-19 vaccine that is safe and effective for the entire world, now and in the years to come. These data are critical to informing the field`s collective efforts in getting a vaccine that is rapidly scalable and universally applicable to all populations,” mentioned Modjarrad.

He added, “Based upon WRAIR`s long experience developing vaccines for other viruses and recent work on coronaviruses, we have been able to move quickly to accelerate research efforts to combat this pandemic that has threatened global health and military readiness.” 

WRAIR was established 127 years in the past to combat all these well being threats and has performed a task within the improvement of almost half of the vaccines in public use right this moment.Rolland, whose analysis often focuses on HIV viral genetics, has shifted her consideration to COVID-19 in the course of the present global well being emergency. 

“It`s critical that people in various fields come together as we focus on learning everything we can about this virus,” she mentioned, including “Teamwork will be vitally important to stem the tide of this pandemic.”

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