China is cracking down on vaccine-related crimes, making dozens of arrests over the production and distribution of fake coronavirus vaccines, price gouging and illegal inoculations, according to the official Xinhua news agency.

One group of suspects made a profit of about $2.8 million by packaging saline solution or mineral water in 58,000 doses of spurious vaccines, Xinhua said, identifying its leader, arrested last Christmas Day, only by the surname Kong.

In other cases, fake vaccines were sold at high prices, included in emergency inoculation schemes at hospitals, or smuggled abroad, it added.

China’s Supreme People’s Procuratorate urged regional agencies to cooperate with police in swift and unwavering action to curb such activities, the agency said.