A third dose of Moderna or Pfizer Covid-19 vaccine should usually be enough to stave off the omicron varient.
In a race to catch up with emerging coronavirus variants, wealthy countries are already benefiting from potent vaccines.
One in 50 people in England now have the disease.
Unvaccinated populations always threaten to reintroduce disease into areas where herd immunity appears to have taken over.
Research shows people afflicted by obesity and diabetes often fare worse in trying to overcome SARS-CoV-2.
The price ceiling on Pfizer’s product will impact what other companies can charge to protect people from Covid-19.
Across the world, about 160 coronavirus vaccines are in various stages of development.
The plan is to initially prioritize health-care workers, people over 65 years old and those with medical conditions.
The idea of purposely infecting people with a dangerous pathogen that has no cure is fueling debate.
A University of Oxford team has begun trials of a potential vaccine and hopes to get efficacy results by September.
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