It wasn’t Swine Flu, It was African swine Fever which is a disease only pigs get.
It has also been reported in Belgium, Slovakia, Serbia, China, Mongolia, Vietnam, Laos, Cambodia, Myanmar, North Korea, South Korea, the Philippines,Timor Leste and Indonesia in 2019. It wasn’t a good year to be a pig. (And it was actually the year of the pig)
China, Korea, Singapore & Malaysia have all had semi-recent outbreaks of infectious diseases be it SARS or Nipah therefore acted a lot quicker within their own countries to restrict movements and trace down contacts.
Chinese numbers are likely to be worse but they have enacted a lot swifter & harsher restrictions on their population that any western country has. (We aren’t exactly welding appartment complex’s door closed)