BEIJING – China has rebuffed repeated US offers to share advanced vaccines as Beijing battles a fast-spreading wave of Covid-19, a rejection thats led to growing frustration among American officials concerned about a resurgence of the pandemic.

Worried about the rise of new variants and impact on Chinas economy, the US has repeatedly offered mRNA vaccines and other assistance to President Xi Jinpings government through private channels, according to US officials who asked not to be identified discussing the deliberations.

US officials have also proposed indirect ways to supply the vaccines in an effort to accommodate political sensitivities in China on accepting foreign aid, they said, without providing more details.

The US offers have been made by senior diplomats, including during a December trip to China by Assistant Secretary of State Daniel Kritenbrink and National Security Council Senior Director Laura Rosenberger, as well as through public health officials and intermediaries. Although US officials have said publicly that theyve offered vaccines to China, the full extent of that outreach hasnt been previously reported.

Chinas Foreign Ministry didnt immediately reply to a request for comment.

Beijing has repeatedly said it has enough vaccines, and its unclear how useful mRNA shots would be as the Omicron variant runs rampant in the country antivirals to treat infection, like Pfizers Paxlovid, is the more urgent need now. The problem for the Communist Party has more been persuading its vulnerable elderly population to take the jab: Only about two-thirds of people over age 80 have gotten fully vaccinated as of November, the last time data was released.

Moreover, accepting vaccines from the US is likely a nonstarter politically for Mr Xi, as it would shine a spotlight on Beijings failure to develop its own mRNA vaccine at a time when China is pushing for self-reliance amid a broader strategic fight with the US. China historically has been reticent to accept outside assistance during crises. Unnecessary deaths

The rising frustration shared by both sides underscores just how hard it will be for the US and China to stabilise ties after a meeting between Mr Xi and President Joe Biden in Bali last year. Its also highlighted the significant distrust and suspicion that remain between the worlds two biggest economies.

The Xi administrations propaganda narrative on Covid has long emphasized its success as an outcome of Chinas unique political institutions, and so this has artificially limited access to external vaccines, said Mr Jude Blanchette, Freeman Chair in China Studies at the Center for Strategic and International Studies.

Even in the midst of a catastrophic outbreak of Covid, Beijing continues to emphasise vaccine nationalism, a decision that will undoubtedly result in unnecessary deaths, he said.

Early on, as tens of thousands of Americans died, China held up its Covid Zero approach of strict quarantines, travel limits and heavy masking as a model to the world that it was saving lives and pointedly suggested the US was recklessly killing its people.

But now China is suddenly allowing the virus to run rampant, an abrupt shift that occurred days after spontaneous street protests against lockdowns.

As a result, the US has ramped up its offers in recent weeks, one of the people said. The two sides continue to speak through health channels, another person said, adding that Chinas response to the repeated US offers has been firm. More On This Topic Chinas sudden reopening sits awkwardly with long-held zero-Covid narrative China urges farmers to avoid CNY holiday gatherings to slow Covid-19 spread Every time, Chinese officials have told their US interlocutors that Beijing has the situation under control and doesnt require assistance, according to the people.

China has never lacked access to mRNA shots. Chinese company Shanghai Fosun Pharmaceutical Group licensed the vaccine developed by BioNTech SE and Pfizer nearly three years ago and planned to distribute 100 million doses in the country, but authorities in Beijing havent granted regulatory approval so far.

Mr Xis administration has officially acknowledged about 30 Covid-19 deaths since it abandoned strict pandemic controls at the beginning of December, prompting governments around the world to impose restrictions on Chinese travellers.

China has said the shift was the correct policy because Omicron isnt as deadly as other variants.

In a briefing on Thursday, Mr Liu Pengyu, a spokesman for the Chinese embassy in Washington, pushed back against suggestions that its vaccines werent effective. More On This Topic EU offers free Covid-19 vaccines to China to help curb outbreak: Financial Times I dont trust it: Vaccine hesitancy lingers even as China Covid-19 cases surge Chinas vaccines

Mr Liu cited a University of Hong Kong study that suggested three doses of Sinovac Biotechs CoronaVac were 97 per cent effective against severe illness or death, roughly in line with three doses of an mRNA vaccine.

Far from needing a vaccine handout from the US, Mr Liu added that China has administered 3.4 billion shots domestically and has an annual production capacity of 7 billion doses, making China a player in vaccine exports.

China can not only meet domestic demand but also supply to other countries in need, he told reporters. We are also working to upgrade the vaccines to make them more effective and bolster vaccinations to cope with possible new variants so that we will continue to play a constructive role in the global Covid fight. Very sensitive

Governments and health officials from around the globe are seeking more transparency from China. Mr Xis government has long blocked foreign inquiries into the origins of Covid-19, frustrating American officials, and the World Health Organisation this week pleaded for more data from China.

US officials have grown even more vexed because China has threatened retaliation over requirements imposed by the US and other nations that travelers coming from China submit proof of a negative Covid-19 test. Still, its unclear what that would look like since China already requires travellers to get a PCR test before entering.

Asked this week if he was concerned about the way China is handling the virus, Mr Biden said, Well, yes I am.

We just got to make the protocol we set out: that if youre flying from China, you got to be tested, and so on, he told reporters. I know theyre very sensitive when we suggest they havent been that forthcoming. BLOOMBERG More On This Topic Chinas decision not to import mRNA vaccines leaves it in a bind China's Xi unwilling to accept vaccines despite threat from protests: US intel