The European Medicines Agency announced on Wednesday that it had found a possible link between AstraZeneca's COVID-19 vaccine, and reports of blood clots in people who received the jabs.
"The PRAC, after a very in-depth analysis, has concluded that the reported cases of unusual blood clotting following vaccination with the AstraZeneca vaccine should be listed as possible side effects of the vaccine."
Despite the proof of blood clotting caused by the vaccine, the executive director of the EMA stressed that the vaccine has proved to be highly effective and is saving lives, reiterating that the benefits outweigh the risks.
However, some countries, including the UK, are making changes to their vaccine guidelines.
The UK government on Wednesday is now recommending that people aged 18 to 29 be offered alternative jabs.
According to the UK's Joint Committee on Vaccination and Immunization, those under the age of 30 should be offered either Pfizer or Moderna vaccines as an alternative, but has not advised against the use of the AstraZeneca vaccine for any other age groups.
Belgium, on the other hand, has restricted the use of the AstraZeneca vaccine to those under the age of 55.
The nation's health ministry said Wednesday that the suspension of the jab for adults aged 18 to 55 is based on "recent scientific advice."
Despite the recent announcement by the EMA, the WHO says based on current information, a causal relationship between AstraZeneca's vaccine and the occurrence of blood clotting is considered plausible, but not confirmed.
It added that specialized studies are needed to fully understand the possible link.
Lee Seung-jae, Arirang News.