A law enforcement officer checks the vaccine supply in Rongan, China.
The case has gone viral in China, where sensitivity over food and drug safety is extremely high after a slew of scandals over the last decade.
A regulator in the northeastern province of Jilin, where Changsheng is based, revealed on Friday that the company had previous year sold 252,600 substandard DPT vaccines to inoculate children against diphtheria, whooping cough and tetanus.
State media have said Changsheng made a public apology and recalled all their rabies vaccine available on the market.
Marina Cui - a 25-year-old mother from the southwestern Yunnan province whose five-month old child took a DPT vaccine last week - said the latest revelations had made her anxious about the overall safety of vaccines.
Biotech firms and Chinese vaccine makers' shares fell across on Monday after Premier Li Keqiang condemned Changsheng Biotechnology Co. for crossing a moral red line.
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On July 15, 2018, the company finally entered the spotlight when China's state drug watchdog discovered evidence of forged data related to 113,000 rabies vaccines.
An official with China Food and Drug Administration (CFDA) said Sunday it found that the company had fabricated production records and product inspection records, arbitrarily changed process parameters and equipment during its production of freeze-dried human rabies vaccines. President Xi Jinping has denounced the scandal as "vile and shocking". "This incident shows that when regulatory oversight works well, potential risks can be averted", he continued.
WHO reiterates that quality-assured vaccines are critical for disease prevention and urges countries to continue using this cost-effective public health intervention.
In 2016, police discovered a criminal ring that had sold improperly stored vaccines worth nearly US$90 million across China over five years. Alipay launched a feature to help parents track vaccinations their children receive. And in 2010, local news reported that four children died after getting unrefrigerated vaccines.
Etched into public memory is the 2008 scandal in which several infants died after industrial chemical melamine was added to milk powder to raise protein levels artificially.
CHINA'S newest product-safety scare burst into the public consciousness when an obscure essay alleging corruption in the pharmaceutical industry become an Internet sensation, exposing widespread anger and distrust after a string of scandals.