Britain will host health ministers from the Group of Seven rich countries in Oxford for a two-day summit, as pressure intensifies to do more to broaden access to COVID-19 vaccines across the world.
British Foreign Secretary Dominic Raab has said equitable access to coronavirus vaccines will be at the top of the agenda when G7 leaders meet.
But as health ministers gather at the University of Oxford, where AstraZeneca's COVID-19 vaccine was invented, charities stressed Britain could do more by supporting a temporary waiver on intellectual property rights of pharmaceutical firms.
US President Joe Biden has backed calls from many developing countries for the waiver, in the hope this would boost production and allow more equitable distribution, but Britain and some European countries have expressed reservations.
"G7 leaders must take this moment to stand on the right side of history by putting their full support behind the vaccine patent waiver," said Anna Marriott, Oxfam's health policy manager.
"The G7 may be getting the vaccines they need but too much of the world is not and people are paying for patent protection with their lives."
Britain has said technology transfers with non-profit pricing, a model AstraZeneca has used, can achieve many of the same aims as a patent waiver without disincentivising research.
A G7 report on progress in efforts to improve health in developing countries will be published on Thursday, and British health minister Matt Hancock said he would agree with G7 counterparts on a system to share data on any early-warning signs of the next pandemic.
"Globally we are only as strong as the weakest link in the health security chain. No one is safe until everyone is safe," Hancock said in a statement.