Why Do Chinese Older Adults in Hong Kong Delay or Refuse COVID-19 Vaccination? A Qualitative Study Based on Grounded Theory.

Interventions to address vaccine hesitancy in older adults should focus on addressing attitude roots and strengthening the connectivity of older adults with family, doctors, and government to engage older adults in the vaccination decision making. Risk communication should shift to provide more personal relevant information in a caring style, meet older adults' preference for peripheral information processing, and address their existing misperceptions about COVID-19 vaccines.