Covax boosted by 500 mn Moderna Covid vaccine doses
The doses will broaden out the portfolio of vaccines under Covax, which seeks to ensure poor countries have equitable access to vaccines to combat the pandemic.
A further 466 million doses of the two-shot vaccine will follow in 2022.
Covax is co-led by the World Health Organization (WHO), the Gavi vaccine alliance and the Coalition for Epidemic Preparedness Innovations (CEPI).
"Expanding and having a diverse portfolio has always been a core goal for Covax, and to remain adaptable in the face of this continually evolving pandemic -- including the rising threat posed by new variants."
The deal also contains options for potential access to future versions adapted to variants of the virus.
Under Covax, the cost of vaccines for the 92 poorest participating economies is covered by donors. The scheme aims to distribute enough doses to jab up to 27 percent of the population in those territories by the end of 2021.
Dozens of wealthier participating countries also buy vaccine supply through the facility with collective purchasing.
Covax vaccines must have authorisation from the WHO.
The UN health agency signed off on the Moderna product on Friday, making the US vaccine the fourth jab to be given WHO's emergency listing after Pfizer-BioNTech, Janssen and AstraZeneca doses made in India and South Korea.
Only AstraZeneca and some Pfizer jabs are currently flowing through the Covax scheme.
Covax has so far shipped more than 49 million Covid-19 vaccine doses globally to 121 participating economies.
"We recognise that many countries have limited resources to access Covid-19 vaccines," said Moderna chief executive Stephane Bancel, welcoming the agreement.
"We support Covax's mission to ensure broad, affordable and equitable access to Covid-19 vaccines and we remain committed to doing everything that we can to ending this ongoing pandemic."
Moderna said last week it expected to produce up to three billion doses in 2022 through new funding commitments to boost supply at manufacturing sites in Europe and the United States.
The Moderna jab is already in use in 46 territories around the world, according to an AFP count.
Delays and donations
Covax's main supplier is the Serum Institute of India, which is producing AstraZeneca vaccines. But increased demand for doses in India itself, where the pandemic is raging, has interrupted supplies being flown out for Covax.
The programme has also been elbowed out of the market by rich countries striking their own deals with manufacturers and surging ahead in immunising their citizens.
The facility urgently needs 20 million doses by the end of June to cover the supply shortage and has been pleading with wealthy countries to donate excess doses.
Sweden, which since March 25 is only using the AstraZeneca jab for over-65s, on Monday donated one million paid-for doses of the vaccine.
"Such support will ensure that people in vulnerable countries, especially, in Africa, will be able to receive their second doses," WHO chief Tedros Adhanom Ghebreyesus said in a statement.
Countries including France and New Zealand have made similar donations recently.
At least 1.165 billion Covid-19 vaccine doses have so far been injected worldwide, according to an AFP count.
Just 0.2 percent have been administered in the 29 lowest-income countries, home to nine percent of the global population.