NHSN Clarifies Definition of Up to Date Vaccination in COVID-19 Vaccination Modules (SNF)

In June 2022, the National Healthcare Safety Network (NHSN) began using the updated definition of up-to-date COVID-19 vaccination issued by the Centers for Disease Control and Prevention (CDC). All facility types reporting data through the COVID-19 Vaccination Module must use the updated definition.

Up to date COVID-19 vaccination includes:

• An individual who has received all doses in the primary series and all recommended booster doses, when eligible.
• Most individuals who are 50 years and older and have received a second booster dose.
• Reporting of up-to-date vaccination status is summarized in the table below.

Individuals are considered up to date with their COVID-19 vaccines during the surveillance period of June 27, 2022 through September 2, 2022 for the purpose of NHSN surveillance if the meet (1) of the following criteria*:

If Under 50 years:

Received at least one booster dose

or

Recently received all recommended doses in the primary vaccine series but is not yet eligible for a booster dose. This includes:

1. Those who complete their 2-dose primary series for an mRNA COVID-19 vaccine (Pfizer-BioNTech or Moderna) less than 5 months ago.
2. Those who received a single dose of Janssen less than two months ago.

If 50 Years and Older:

Received second booster dose (or received first booster dose less than 4 months ago and not yet eligible for a second booster dose)

or

Recently recieved all recommended doses in the primary vaccine series but is not yet eligible for a booster dose. This includes:

1. Those who completed their 2-dose primary series of mRNA COVID-19 vaccine (Pfizer-BioNTech or Moderna) less than 5 months ago.
2. Those who received a single dose of Janssen less than two months ago.

*Individuals with a moderately to severely immunocompromising condition are considered up to date in the following cases:

1. Received an additional dose less than three months ago, if primary series was the Moderna or Pfizer-BioNTech COVID-19 vaccine; or
2. Received an additional dose less than two months ago, if primary series was the Janssen COVID-19 vaccine; or
3. Received an additional dose and one booster dose less than four months ago; or
4. Received a second booster dose.​

If data does not reflect the updated definition, facilities are encouraged to go back into NHSN and update their data.