The worry over COVID-19 prompted all FENC sites in Taiwan to arrange on-site flu shot campaigns during the 4 quarter of 2021. Such arrangement keeps employees from the hassle of having to travel to major hospitals, hence minimizing the risk of exposure and clustering. Hsinpu Chemical Fiber Plant helped employees under the age of 50, who are ineligible for free vaccines provided by the government, to be inoculated by the local health centers and hospitals at the plant. In 2021, the eligibility is extended to cover employees of foreign nationality, and the overall vaccination rate increased to 42%.

In 2021, 1,058 employees at Hsinpu Chemical Fiber Plant received flu shots on-site. A total of 890 employees, 337 Taiwanese nationals and 553 foreign nationals, received flu shots subsidized by the plant; 172 employees received the free flu shot provided by the government. The vaccination rate reached 41% with NT$890,000 in total costs.