As indirect evidence is compatible with protection against severe Covid-19, the situation remains to be demonstrated in ongoing clinical trials and post-implementation evaluations.
AstraZeneca said it is yet to be fully determined whether the vaccine protects against severe disease caused by the highly transmissible coronavirus variant found in South Africa.
AstraZeneca said it had not been able to properly ascertain the effect of the vaccine on severe disease and hospitalisation caused by the South African variant.
This regimen was shown in clinical trials to be safe and effective at preventing symptomatic Covid-19, with no severe cases and no hospitalisations more than 14 days after the second dose, according to AstraZeneca.
In addition, Mumbai airport said Tuesday that all air passengers from anywhere in Europe or the Middle East will have to go into institutional quarantine upon arrival and then be tested.
The Pfizer-BioNTech jab is one of several vaccines bringing hope for an end to the pandemic that has killed more than 1.5 million people worldwide and ravaged economies.
Poonawalla joined the Serum Institute of India in 2001 and became the CEO of Serum Institute with complete control of the day-to-day operations of the company in 2011.
Modi began his three-city visit on Saturday to review coronavirus vaccine development work by going to pharma major Zydus Cadila's manufacturing facility near Ahmedabad in the morning.
Zydus Cadila has announced that the phase-I clinical trial of its vaccine candidate ZyCoV-D was over and it has commenced phase-II clinical trials from August.
Zydus Cadila had announced that the phase-I clinical trial of its vaccine candidate ZyCoV-D was over and it has commenced phase-II clinical trials from August.
Vaccine showed 90% efficacy in one dosing regimen when the vaccine was given as a half dose, followed by a full dose at least a month later, and another dosing regimen showed 62% efficacy when given as two full doses