The DHB was present at the Rātana celebrations over the weekend, but mainly in an educational capacity. One person had a swab test at Rātana.
A 56-year-old woman from Northland was the first community case in the country in more than two months.
Since then, there have been two new cases in Auckland with the same South African strain of the virus discovered on Wednesday evening. The father and child pair stayed in the same quarantine facility as the Northland case.
The Whanganui DHB spokesman said the latest cases are a reminder Covid-19 is still around.
"The news this week of a community case of Covid-19 in Northland and further community cases from people who have left managed isolation in Auckland is a stark reminder that we must remain vigilant against the threat of the virus."
He reminded people of the importance of staying home if you're unwell and getting tested, washing your hands and coughing and sneezing into your elbow, regularly cleaning commonly touched surfaces and signing into places using the NZ Covid Tracer app.
"The Northland case has shown how important it is that people continue to use the NZ Covid Tracer app – this improves our chances of quickly stopping the spread of Covid-19 if new cases emerge in the community. People should keep scanning and... have bluetooth tracing enabled on the dashboard of the NZ Covid Tracer app.
"Bluetooth tracing allows people to receive an alert if they've been near another app user who tests positive for Covid-19. We ask that everyone makes this part of their daily routine as it allows people to be notified quickly if they are exposed to Covid-19 and is one of the most effective tools we have."
Those who are unable to use the NZ Covid Tracer app should keep a record of where they have been. A NZ Covid Tracer diary booklet is available and can be ordered through https://order.hpa.org.nz/collections/covid19/products/covid-19-booklet or by emailing covid19response@dpmc.govt.nz