China sent one official back home and the other is staying in a third country until they are granted entry.
"2021 is literally going to be catastrophic based on what we're seeing at this stage of the game,"said the head of the World Food Program.
Ethopia army chief of staff General Birhanu Jula made the claims on TV without providing evidence.
Even the World Health Organisation's strict hygiene,screening and prevention measures have not been sufficient to spare it from the pandemic.
Taiwan is locked out of most global organisations such as the WHO due to the objections of China,which considers the island one of its provinces.
GDP could face a $55 billion hit if the government's assumption that a COVID-19 vaccine can be rolled out across the population by late next year proves false.
"We will need vaccines and there is hope that by the end of this year we may have a vaccine,"WHO Director-General Tedros Adhanom Ghebreyesus said.
Less than 10 per cent of what WHO needs for its coronavirus vaccines,treatments and diagnostics program has so far been donated.
More than 827,000 people have died with the virus since it emerged in China late last year,according to the Johns Hopkins University tally.
It took almost six months to reach 10 million cases after the first infection was reported in China in early January. It took just 43 days to double that tally to 20 million.
The proportion of those aged 15 to 24 who are infected with coronavirus has risen three-fold in five months.