Geneva: The World Health Organization (WHO) said that it was still conducting its safety review of the AstraZeneca/Oxford Covid-19 vaccine as more European countries have suspended the use of this jab following reports that some recipients developed blood clots and died after being inoculated.
Since March 12, "several countries have suspended the use of AstraZeneca vaccine as a precautionary measure after reports of blood clots in people who had received the vaccine from two batches produced in Europe", WHO Director-General Tedros Adhanom Ghebreyesus said at a press briefing here on Monday.
However, he added that "this does not necessarily mean these events are linked to vaccination, but it's routine practice to investigate them and it shows that the surveillance system works and that effective controls are in place".
He emphasized that the WHO's Global Advisory Committee on Vaccine Safety has been reviewing the available data, is in close contact with the European Medicines Agency (EMA) and will meet on Tuesday.
The European nations that has halted the usage of the vaccine are France Germany, Italy, Spain, Slovenia, Cyprus, Portugal,Austria, Bulgaria, Denmark, Romania, Estonia, Lithuania, Luxembourg, Latvia, the Netherlands, as well as non-EU countries of Norway and Iceland.
Tedros said that "the greatest threat that most countries face now is lack of access to vaccines", as "some of the world's richest countries are buying enough vaccines to immunise their populations several times over", while many other countries have nothing.
The WHO chief continued to call on all countries to work in solidarity to ensure that vaccination begins within the first 100 days of this year.
"No country can simply vaccinate its way out of this pandemic alone. We are all in this together," he said.
An additional number of European countries -- France Germany, Italy, Spain, Slovenia, Cyprus, Portugal -- have also suspended the use of the AstraZeneca Covid-19 vaccine over blood clot concerns.
The countries on Monday described the move as a precautionary measure pending a decision by the European Medicines Agency (EMA), which had greenlighted the use of the vaccine in the European Union (EU) on January 29, reports Xinhua news agency.
"The EMA is to give its opinion tomorrow afternoon. The decision that was taken (by France), in accordance with our European policy, is to suspend as a precaution the vaccination with AstraZeneca, hoping to resume it as soon as possible if the opinion is favourable," French President Emmanuel Macron said at a press conference on Monday.
In Berlin, Health Minister Jens Spahn cited a recommendation issued by the Paul Ehrlich Institut (PEI), an agency of the Health Ministry, referring to new reports of thromboses of the cerebral veins in connection with the AstraZeneca jabs.
The Italian Pharmaceutical Agency (AIFA) said its "temporary and precautionary" ban on the vaccine followed the death of a music professor in the Piedmont region after he was given an AstraZeneca shot.
A probe on this case has been opened in the city of Biella.
In Cyprus, a Health Ministry spokesman said the suspension will last only until Thursday.
The Ministry sought to allay concern among people who have already received the vaccine, repeating an earlier statement that there is no solid evidence that the AstraZeneca vaccine was to be blamed for the development of blood clotting.
Slovenian Health Minister Janez Poklukar told reporters that the country's expert group for vaccines had not found reasonable grounds to stop using the AstraZeneca vaccine. Nevertheless, as a matter of precaution, it is proposed that vaccination be suspended.
All those scheduled to receive the vaccine in the coming days will be rescheduled, whereas vaccination with the Moderna and Pfizer vaccines will continue as planned, he said.
In Spain, Health Minister Carolina Darias said "the thrombosis that the patients have suffered in the known cases is very specific".
At the same time, the minister highlighted the low risk from the vaccine, saying that "939,534 people in Spain have been inoculated with the vaccine" while only a single case of thrombosis has been reported.
EU member countries Austria, Bulgaria, Denmark, Romania, Estonia, Lithuania, Luxembourg, Latvia, the Netherlands and non-EU countries Norway and Iceland have already fully or partially suspended the use of the AstraZeneca vaccine following reports of suspected deaths from blood clots after vaccinations.
Globally, 263 candidate vaccines are still being developed worldwide, 81 of them in clinical trials, according to the World Health Organization.