The extraordinary vaccination of more than four billion people, and the lack of access for many others, were major forces this year — while Omicron’s arrival complicated things further.
2021 was the year of COVID-19 vaccines, but it was also the year of variants. Researchers identified a trio of SARS-CoV-2 ‘variants of concern’ in late 2020 and early 2021,. They seemed to spread faster than earlier circulating viral lineages, and scientists worried that these variants might also blunt the effectiveness of vaccines.
Despite these challenges, the vaccines are still doing a good job at protecting against the most severe forms of COVID-19, says Laith Jamal Abu-Raddad, an infectious-disease epidemiologist at Weill Cornell Medicine–Qatar in Doha. “We now have lots of data and we see a very clear pattern that the vaccines are working very well against severity.”, designated a variant of concern in late November.
Other upcoming COVID-19 vaccines are being formulated so that they can be administered by mouth or inhaled through the nose, such as nasally administered vaccines being developed by CanSino and AstraZeneca. Because these vaccines would be administered directly into the tissues that SARS-CoV-2 first infiltrates when it enters the body, it is hoped that oral or nasal vaccines could work well to prevent infection. They would also require fewer trained health-care personnel to administer injections.
México Últimas Noticias, México Titulares
Similar News:También puedes leer noticias similares a ésta que hemos recopilado de otras fuentes de noticias.
Citing COVID-19 impacts, Harvey Nichols sees significant losses in 2021British department store chain Harvey Nichols recorded sale decreases throughout the fiscal year 2021, with the losses ostensibly stemming from several factors.
Leer más »
COVID vaccines weren't the only big health breakthroughs in 20212021 was a tough year, but it was also packed with advances in science medicine. Here are some of the health stories that make us optimistic about 2022.
Leer más »
UK air travel sees huge slump in 2021 due to CovidInternational flights to and from the UK fell to just 400,000 this year, says analytics firm Cirium.
Leer más »
Chicago Restaurant With COVID-19 Vaccine Requirement Already In Place Has Advice As Citywide Mandate ApproachesThe COVID-19 vaccination mandate for Chicago and Cook County businesses is just days away - coming up Monday, Jan. 3. But it won't change a single thing for some businesses with which CBS 2’s Tara Molina connected with Tuesday.
Leer más »