"We do not recommend mixing the Covid-19 vaccines - if your first dose is the Pfizer vaccine you should not be given the AstraZeneca vaccine for your second dose and vice versa", Ramsay said in a statement.
"Urge all citizens to entrust the stringent protocols followed for ensuring safety, efficacy and immunogenicity of the approved vaccines".
SII plans to sell the AstraZeneca/Oxford vaccine to the Indian government at about 250 rupees ($3.42) per dose and 1,000 rupees on the private market.
Both vaccines will be administered in two doses and stored at 2-8° degrees Celsius (36 to 48°F), he said, without clarifying what intervals between shots were being recommended. Dr. Mary Ramsay, Head of Immunisations at Public Health England, said if people have had the Pfizer jab first, they should not receive the AstraZeneca shot.
AstraZeneca has since entered a partnership with the Sputnik V manufacturer, whose inoculation proved to be 91.4% effective based on data analysis of the final control point of clinical trials, to ultimately boost the efficacy of its shots to over 90 percent. Despite having one of the largest immunisation programs, it isn't geared around adults and vaccine coverage remains patchy.
"This is a very positive step toward ensuring global access to Covid-19 vaccines", said Mariangela Simao, a top World Health Organization official tasked with ensuring access to medicines.
New Delhi: Two Corona vaccines have been approved for emergency use by the Controller General of Indian Medicine.
The vaccine was first approved in the United Kingdom on December 8 for emergency use within the country, with the US, Canada and European Union following soon after.
As reported by Reuters, the Mexican doctor experienced seizures, difficulty breathing and a skin rash after receiving the Pfizer-BioNTech COVID-19 vaccine. Moreover this is a violation of the criteria in the draft regulatory guidelines for development of Covid-19 vaccines published by CDSCO on September 21, 2020. As many as 217 people died of Covid-19 during the same period.
Study author Dr Merryn Voysey, from the University of Oxford, has noted this in the Lancet and has stated that focus will be placed on these groups to determine the effectiveness of the vaccine.
Immunity starts to kick in after the first dose but reaches its full effect seven days after the second dose.
On Dec 26, it emerged how a mix up with the Oxford vaccine occurred when a the scientists misread the strength of a dose received from the Italian manufacturers. But late clinical trials began in mid-November.
Professor Calum Semple has described the Oxford vaccine as a "game changer".
"It is not clear if there is any scientific basis to claim that COVAXIN will be effective in the "context of infection by mutant strains" when its efficacy has not been established and is now unknown against any strain of the virus", it said.
Both vaccines are meant to be administered as two shots, given several weeks apart, but they were not created to be mixed together.
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