# Measles Exposure — Blood donor deferral criteria compared across national blood services

For Measles Exposure, blood service is American Red Cross (US); waiting period is 4 weeks; condition is if you have not been vaccinated or it has been less than 4 weeks since being vaccinated; outcome is temporary deferral, recorded from its source on 2026-08-06.

- **Criterion:** Measles Exposure
- **Blood service:** American Red Cross (US) _(our reading, not quoted from the source)_
- **Waiting period:** 4 weeks _(verified: appears in the quote below)_
- **Condition:** if you have not been vaccinated or it has been less than 4 weeks since being vaccinated _(verified: appears in the quote below)_
- **Outcome:** temporary deferral _(our reading, not quoted from the source)_

## What the source says

> Acceptable if you are healthy and well and have been vaccinated for measles more than 4 weeks ago or were born before 1956. If you have not been vaccinated or it has been less than 4 weeks since being vaccinated, wait 4 weeks from the date of the vaccination or exposure before donating.

## Source

- https://www.redcrossblood.org/donate-blood/how-to-donate/eligibility-requirements/eligibility-criteria-alphabetical.html

Last verified: 2026-08-06. Review by: 2027-02-02.
Part of [Blood donor deferral criteria compared across national blood services](https://referencesource.org/blood-donor-deferral-criteria/).