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| Vaccine groups | Days after second dose (range) | Age, y (range) |
|---|---|---|
| AstraZeneca | 146 (129–173) | 66.0 (61–72) |
| Pfizer-BioNTech | 99.5 (65–170) | 44.6 (27–65) |
| Sinovac | 46.0 (23–131) | 44.5 (23–92) |
*AstraZeneca (AZD1222), https://www.astrazeneca.com; Pfizer-BioNTech (BNT162b2), https://www.pfizer.com; Sinovac (CoronaVac), http://www.sinovac.com.
