JOHANNESBURG (REUTERS) - Rich nations would do better to send vaccines to Africa to help fight the global Covid-19 pandemic rather than hoarding them for third-dose booster shots that scientific evidence does not back, the African Union's (AU) top health official said on Thursday (Sept 9).

       Africa Centres for Disease Control and Prevention (Africa CDC) director John Nkengasong told a news conference he was baffled some rich countries were disregarding World Health Organisation (WHO) advice to hold off from booster shots until more people were fully vaccinated worldwide.

       "The problem we have with the third doses is: we have not seen enough science behind them," he said.

       "It is really confusing to me as to why we are moving towards a vast (administration)... of the booster dose."

       Wealthy countries such as Germany, France and Israel are planning to administer third shots, over concerns that immunity from the standard two-shot regimen is waning.

       "We do not know at what point immunity drops to a level at which it stops offering (protection)," Dr Nkengasong said.

       "Without (that science), you'll surely be gambling."

       The global programme providing Covid-19 vaccines to poor countries is on course to fall nearly 30 per cent short of its previous goal of two billion shots this year, the international organisations running it said on Wednesday.

       The Covax programme also urged rich countries that had met their domestic needs to forfeit volumes rather than administer third shots.

       Dr Nkengasong said such programmes in the West would make it hard for Africa to meet its target for vaccinating 60 per cent to 70 per cent of people, for which it needed at least 1.6 billion doses.

       Currently, only 3 per cent of the continent was vaccinated, he said, while 145.4 million vaccine doses had been procured across the continent, of which three quarters had been administered.

       In the meantime, the coronavirus continued to evolve, as it coursed though unvaccinated populations, he said. "Today it's the Delta variant, tomorrow we just don't know which variant will be out there."

       Africa has recorded 7.9 million cases, of which 201,000 have been fatal, he said.

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