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The COVID-19 vaccination program in Colombia is an ongoing effort of mass immunization put in place by the Colombian government in order to respond to the ongoing COVID-19 pandemic. The virus causing COVID-19 was confirmed to have reached Colombia on 6 March 2020. [2] [3] Colombia's preparation and readiness for a vaccine program allowed it to ...
National regulatory authorities have granted full or emergency use authorizations for 40 COVID-19 vaccines.. Ten vaccines have been approved for emergency or full use by at least one stringent regulatory authority recognized by the World Health Organization (WHO): Pfizer–BioNTech, Oxford–AstraZeneca, Sinopharm BIBP, Moderna, Janssen, CoronaVac, Covaxin, Novavax, Convidecia, and Sanofi ...
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 ...
According to a June 2022 study, COVID‑19 vaccines prevented an additional 14.4 to 19.8 million deaths in 185 countries and territories from 8 December 2020 to 8 December 2021. [ 405 ] On 10 December 2021, the UK Health Security Agency reported that early data indicated a 20- to 40-fold reduction in neutralizing activity for Omicron by sera ...
A study conducted on 44 rats injected with the Pfizer–BioNTech COVID-19 vaccine at doses over 300 times the human dose by body weight and 44 rats injected with placebo found no statistically significant evidence of any adverse effects on the fertility of female rats or on the health of the offspring of rats (the 3% lower pregnancy rate found ...
The United States Department of Defense conducted a clandestine social media operation to spread disinformation about Chinese COVID-19 vaccines in Southeast Asia, Central Asia, and the Middle East. This operation was initiated under the Trump administration in early 2020 and discontinued by the Biden administration in early 2021.
As of 7 July 2021, CoronaVac is the most widely used COVID-19 vaccine in the world, with 943 million doses delivered globally. [40] In July, Sinovac signed advanced purchase agreements with GAVI to supply COVAX with 50 million doses in the third quarter of 2021 and up to a total of 380 million doses by the first half of 2022.
A phase I clinical trial was carried out to evaluate the safety and immunogenicity of the vaccine candidate in about 360 participants. [4] The phase II concluded in April 2021. [12] [13] [14] In April 2021, the Drugs Controller General of India permitted the vaccine candidate to start phase III clinical trials. A total of 1,268 healthy ...