The year was 1988.
The Chinese population has doubled within 40 years since the founding of People's Republic of China. Such growth without mass vaccination got the global cultists (i.e. the Club of Rome) worried. So worried that they played '2020 plandemic' script in the largest Chinese city Shanghai:
Hospital ran out of beds;
'Hepatitis positive case' competition on TV;
Fresh water cockle being the ‘source of infection’ ;
Professors 'found' the 'virus' in the monkey kidney cell culture.
A Temporary Hepatitis A Ward Converted From an Auditorium in Shanghai
By 1992, the "hepatitis B vaccine' (Merck) entered the childhood vaccination schedule of China, a country of 1.1 billion population.
"There is nothing new under the sun."
Source:
1. English (Machine translated): https://odysee.com/@davidbb:7/English-Hepatitis-A-Epidemic-and-Prevention-in-Shanghai-1988:b
2. 中文: https://odysee.com/@davidbb:7/Hepatitis-A-epidemic-and-prevention-in-shanghai-1988-chinese:c