Timing matters for Covid vaccine effectiveness


Younger and older people gained greater protection if they had their jabs in the middle of the day.

Pediatric COVID Vaccinations During Omicron in San Francisco.

People under 20 or over 50 reaped the biggest extra benefit from SARS-CoV-2 vaccinations administered between late morning and early afternoon. Credit: Santiago Mejia/The San Francisco Chronicle/Getty

The time of day at which a person receives a COVID-19 vaccine might influence how well it protects them from the disease1.

Access options

Access Nature and 54 other Nature Portfolio journals

Get Nature+, our best-value online-access subscription

£24.99 per month

cancel any time

Subscribe to this journal

Receive 51 print issues and online access

£199.00 per year

only £3.90 per issue

Rent or buy this article

Get just this article for as long as you need it


Prices may be subject to local taxes which are calculated during checkout

Nature 617, 226 (2023)

doi: https://doi.org/10.1038/d41586-023-01463-6


Read More

Leave a Comment