Research has found that close to 60 percent of the population have antibodies which make them resistant to COVID-19 because they have been vaccinated or because they were infected and then recovered from the coronavirus, Niedzielski said.
"It seems that we are approaching the threshold of herd immunity," he added.
Nearly 10 million Poles have been fully inoculated for COVID-19.
Officials on Tuesday reported 215 new infections, down from a single-day high of 35,251 on April 1.
The prime minister's top aide, Michał Dworczyk, who is spearheading the country's inoculation drive, said more than 2.4 million shots had been administered in Poland over the last week, the highest figure so far over seven days.
(pk)
Source: IAR/Polish Radio