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By April, with a surge in COVID cases in a third wave of infections, Sri Lanka faced a severe shortage of the Astra-Zeneca vaccine due to an export ban by India. [4] This left majority of the 3.5% of the population that was given the first dose without access to the second. [ 5 ]
The Pfizer–BioNTech COVID-19 vaccine, sold under the brand name Comirnaty, [2] [33] is an mRNA-based COVID-19 vaccine developed by the German biotechnology company BioNTech. For its development, BioNTech collaborated with the American company Pfizer to carry out clinical trials , logistics, and manufacturing.
The COVID-19 pandemic in Sri Lanka is part of the ongoing worldwide pandemic of coronavirus disease 2019 (COVID-19) caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virus. The first case of the virus in Sri Lanka was confirmed on 27 January 2020, after a 44-year-old Chinese woman from Hubei , China , was admitted to ...
Hospitalisations and deaths from Covid-19 have been rising for weeks in the US, and global health authorities are monitoring two new variants, BA.2.86, known as Pirola, and EG.5, known as Eris.
An updated Coronavirus booster that targets a new variant is expected to be made available in September FDA approves updated Moderna and Pfizer Covid boosters set to arrive soon as cases rise ...
How COVID‑19 vaccines work. The video shows the process of vaccination, from injection with RNA or viral vector vaccines, to uptake and translation, and on to immune system stimulation and effect. Part of a series on the COVID-19 pandemic Scientifically accurate atomic model of the external structure of SARS-CoV-2. Each "ball" is an atom. COVID-19 (disease) SARS-CoV-2 (virus) Cases Deaths ...
[1] [2] [3] As of 17 February 2025, 777,368,165 [4] cases have been stated by government agencies from around the world to be confirmed. Of the 248 recognized countries and territories around the world, 229 have reported cases of COVID-19 . [ 5 ]
A number of COVID‑19 vaccines began to become approved and available at scale in December 2020, with vaccinations beginning to ramp up at scale from the beginning of 2021, among them the Oxford–AstraZeneca COVID‑19 vaccine, based on an adenovirus vector and internally termed AZD1222. [citation needed]