US pharmaceutical company Pfizer has identified fake doses of its vaccine against Covid-19 in Mexico and Poland, Sputnik quoted The Wall Street Journal report.

In Mexico, some 80 people got fraudulent vaccines at a clinic for about US$1,000 (RM4,110) per dose. The doses also had fake labels.

In Poland, fake doses of the Covid-19 vaccine are likely to have been an anti-wrinkle medicine. The Polish authorities said that no one had received the fake vaccines.

The World Health Organization (WHO) declared the Covid-19 outbreak a pandemic on March 11, 2020. To date, more than 143.48 million people have been infected with the coronavirus worldwide, with over 3.05 million fatalities, according to Johns Hopkins University.

The safety committee of the European Medicines Agency (EMA) has found that the Oxford-AstraZeneca Covid-19 vaccine can cause unusual blood clots with low blood platelets, but stresses the overall benefits of the vaccine in preventing coronavirus outweigh the risks of side effects.

“EMA is reminding healthcare professionals and people receiving the vaccine to remain aware of the possibility of very rare cases of blood clots combined with low levels of blood platelets occurring within 2 weeks of vaccination,” the agency said in a statement Wednesday.

“So far, most of the cases reported have occurred in women under 60 years of age within 2 weeks of vaccination. Based on the currently available evidence, specific risk factors have not been confirmed.”

The World Health Organization said Friday there was no reason to stop using AstraZeneca’s Covid-19 vaccine after several European countries suspended the roll-out over blood clot fears.

The WHO said its vaccines advisory committee was currently looking at safety data and stressed that no causal link had been established between the vaccine and clotting.

Denmark, Norway, Iceland, Italy and Romania postponed or limited the rollout of AstraZeneca vaccines after isolated reports of recipients developing blood clots.

“AstraZeneca is an excellent vaccine, as are the other vaccines that are being used,” WHO spokeswoman Margaret Harris told reporters at a briefing in Geneva.

“We’ve reviewed the data on deaths. There has been no death, to date, proven to have be caused by vaccination,” she said.

“Yes, we should continue using the AstraZeneca vaccine,” she added, stressing though that “any safety signal must be investigated.”

“We must always ensure that we look for any safety signals when we roll out vaccines, and we must review them,” she said.

“But there is no indication to not use it.”