Pfizer Inc's CEO Albert Bourla has said that the company is "not certain" if those who receive its vaccine will be able to transmit the coronavirus to others, just one day after the UK became the first to approve the inoculation.

Pfizer CEO 'not certain' if coronavirus vaccine will prevent transmission

After the UK government approved the Pfizer-BioNTech's coronavirus vaccine, German firm BioNTech said it has taken steps to accelerate the process together with authorities without shortcuts.

Took steps to accelerate COVID-19 vaccine process without shortcuts: German firm BioNTech

Pfizer and its partner BioNTech confirmed on Friday they have applied to US health regulators for emergency use authorisation (EUA) of its COVID-19 vaccine, becoming the first to do so in the US as the pandemic rages around the world.

Pfizer, BioNTech apply for emergency use of coronavirus vaccine in US

The US and Europe are in line to get the first doses of an experimental coronavirus vaccine after a partnership between Pfizer Inc. and BioNTech SE delivered dazzling preliminary results in a large patient trial.

Countries queue for Pfizer's COVID-19 vaccine

U.S. infectious disease expert Anthony Fauci said on Thursday vaccine developers should push to make billions of their COVID-19 vaccines to ensure access to all parts of the world, instead of focusing on the rich countries.

Fauci hopeful about the prospects for a successful COVID-19 vaccine