Never allow ? Ok.
"In July, China experienced its “worst public health crisis in years” as stated by South China Morning Post. Chinese vaccine maker Changsheng Biotechnology was found to have fabricated production and inspection records and to have arbitrarily changed process parameters and equipment during its production of freeze-dried human rabies vaccines. Furthermore, substandard diphtheria, pertussis, and tetanus (DPT) vaccines produced by Changsheng Biotechnology were administered to 215 184 Chinese children; and 400 520 substandard DPT vaccines produced by Wuhan Institute of Biological Products were sold in Hebei and Chongqing. On July 25, China's drug regulator launched an investigation into all vaccine producers across the country. 15 people from Changsheng Biotechnology, including the chairman, have been detained by Chinese authorities.
This latest vaccine scandal follows on from a series of fake and substandard food and drugs issues in China. As a result, many parents have lost faith in the vaccine system. Although no cases of death or other severe consequences relevant to the substandard rabies and DPT vaccines have been documented as of July 31, the substandard vaccines have been reported as being poisonous in social media and on the internet."
This is the reality of the 100 % effective and perfect Chinese vaccine industry.
While India which supplies 70 % of the worlds vaccine supply has had no such recorded incidents.
You are too stupid to be replied to seriously.