Moscow’s South-South vaccine efforts have fallen short of expectations and don’t pose as big a challenge to the West as initially presumed.
Faced with limited Covid-19 vaccine supplies, many countries chose to delay the administration of the second doses. Here’s the science behind the delay and timing of the jabs.
The South African firm will begin producing the Pfizer-BioNTech Covid-19 vaccine in 2022 and all will be marked for distribution for countries under the African Union.
A study in Hong Kong adds to growing body of evidence that vaccines using mRNA technology offer better protection against the coronavirus
Experts warn that returning to pre-pandemic social and economic life can be disastrous as the coronavirus pandemic is not over yet.
The World Health Organization has said that any Covid-19 vaccines it has authorised for emergency use should be recognised by countries as they open up their borders to inoculated travellers.
Reports by Israeli media come after the Palestinian Authority called off an agreement whereby Israel would transfer 1 million doses of similarly expiring vaccines to Palestine in exchange for a similar number of new ones later this year.
World leaders and experts say sharing vaccine know-how is the best chance to fight the pandemic. But the industry disagrees.
With delays in global production and distribution, mixing two doses of vaccines may end up becoming inevitable. But questions concerning its safety and efficacy remain unanswered.
The drug-making company says their shot was also 100 percent effective in preventing illness among trial participants in South Africa, where a new variant called B1351 is dominant, though the number of those participants was relatively small at 800.
Phase 3 trials carried out on 2,260 adolescents in the US "demonstrated 100 percent efficacy and robust antibody responses," the companies say.
The scientists used spent vials of the Moderna vaccine to reverse-engineer its mRNA sequences.
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