PT - JOURNAL ARTICLE ED - , TI - Interim statement on covid-19 vaccine booster doses DP - 2021 Sep 01 TA - Saudi Medical Journal PG - 1052--1054 VI - 42 IP - 9 4099 - http://smj.org.sa/content/42/9/1052.short 4100 - http://smj.org.sa/content/42/9/1052.full SO - Saudi Med J2021 Sep 01; 42