Challenges That Could Delay Vaccine Rollout in Asia

Asia is in a favorable position regarding COVID-19 control compared to the US and Europe. Many Asian countries have vaccine deals, including with Pfizer, but require their own regulatory approvals. China has been using its vaccines under emergency use but lacks transparency. Hong Kong, Japan, and Australia are conducting trials to ensure vaccine safety for their populations. The rollout of vaccines in Asia will take time due to regulatory processes.

What challenges are faced by countries in Asia regarding the approval and rollout of vaccines?

How has China's approach to vaccine distribution differed from that of other countries mentioned in the text?