Dec 23, 2021 · According to the WHO, on September 2, 2021, the vaccine was adsorbed to 0.5-mg alum and packed into prefilled syringes in 0.5-mL sterile phosphate-buffered saline without preservative. On October 11, 2021, the WHO stated, 'People aged 60 and older who received the Sinopharm vaccines should get a third dose.
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