新加坡数据尚不明确。官方提出了一个“全免过期”的概念,来推动加强针
MOH to review expiry date of COVID-19 fully vaccinated status as more data on boosters become available
https://www.channelnewsasia.com/singapore/covid19-vaccine-expiry-date-365-days-booster-moh-2308821
还进一步明确了“不打不包”的立场
People ‘unvaccinated by choice’ in Singapore no longer can receive free covid-19 treatment
