Waikato DHB confirmed two nurses have tested positive for Covid-19.
The nurses, who work in the same ward at Waikato Hospital, were stood down immediately on developing symptoms.
Waikato DHB Chief Executive Dr Kevin Snee said the hospital was taking all precautions.
"The staff acted in line with DHB policy to stand down if they are unwell. However, there is a very small risk of transmission even in those without symptoms and we have therefore taken a very precautionary approach.
"Staff who were working on that ward during the previous week (March 31 to April 6) have been stood down as we obtain more information regarding the nursing movements to enable us to return those staff where there is no risk back to the workforce as quickly as possible."