Police in China and South Africa have seized thousands of doses of counterfeit Covid-19 vaccine and made dozens of arrests, Interpol reports.
In China, police made 80 arrests at a factory allegedly making fake vaccine, where at least 3,000 doses were found.
Three Chinese nationals and a Zambian were detained at a warehouse in Gauteng, South Africa, where ampoules containing 2,400 doses were discovered.
Interpol said it was also getting reports of other fake vaccine rings.
Interpol, short for the International Criminal Police Organization, is based in Lyon, France and facilitates international co-operation between police forces and crime control.
The Covid-19 pandemic has claimed more than 2.5 million lives worldwide and infected nearly 115 million people, according to a Johns Hopkins University estimate.
“Any vaccine being advertised on websites or the dark web, will not be legitimate, will not have been tested and may be dangerous,” it said
Vaccines are a vital tool for overcoming the pandemic and competition is fierce worldwide to buy up available doses following the approval of a growing number of products by medical authorities in recent months.