If booster shots are given on priority, the pace of vaccination may slow further. In the worst case scenario, the country will take till mid-March to vaccinate its entire adult population partially.
US President Joe Biden on Tuesday (local time) said that Pfizer's COVID-19 antiviral pill mark a significant step forward in the path out of the pandemic.
The updates come as Covid cases, deaths and hospitalization are all rising again and the US hovers around 800,000 pandemic deaths
Business Standard brings you the top headlines on Tuesday
Two doses of Pfizer AstraZeneca Covid vaccines generate lower levels of antibodies against the Omicron variant of coronavirus.
The U.S. drugmaker will pay $100 a share in an all-cash transaction for San Diego-based Arena, bringing assets in gastroenterology, dermatology and cardiology
The third dose of the Pfizer Covid-19 vaccine can reduce mortality due to the Delta variant of the SARS-CoV-2 virus by 90 per cent, according to a study conducted in Israel.
BioNTech and Pifzer are the first manufacturers of a Covid vaccine to issue an official update on the efficacy of their shot against Omicron
A booster with the current version of the vaccine increased antibodies 25-fold, providing a similar level as observed after two doses
South Africa research shows that blood from people who had received two doses of the vaccine and had a prior infection were mostly able to neutralise the variant.
Pfizer has to date pledged 40m doses out of global production to Covax
Six different COVID-19 boosters are safe and elicit strong immune response in people who have previously received a two-dose course of AstraZeneca or Pfizer vaccines.
Vaccines are effective in decreasing hospitalization and deaths from Covid-19 infection but the emergence of viral variants of concern may diminish their efficacy, according to a recent study.
Pfizer and Moderna shots give large antibody boosts regardless of whether a person initially received those vaccines.
Pfizer's chief executive Dr Albert Bourla said he is of the view that annual vaccinations would be needed to maintain a "very high level of protection" against the deadly disease
The country has identified seven people with the new variant as of Nov. 30.
The companies also promised to develop a new vaccine against the variant in about 100 days
In Kadiri town in Anantapuramu district, a building under construction collapsed due to incessant rain and fell on an adjoining one, killing at least five persons, including two children
Currently, Canada only accepts travellers who have received the vaccines, including Pfizer, Moderna, AstraZeneca and Johnson and Johnson
The regulator's decision paves the way for millions of Americans to get additional protection