The booster shot will be administered at least six months after full vaccination and is designed to help people who have been double-jabbed retain their immunity, public health officials said.
Until now booster shots were only available to people aged over 50, those with impaired immunity and healthcare workers.
"It is a very important dose because waning immunity over time means booster jabs are vital for continued protection," Waldemar Kraska, a deputy health minister, told public broadcaster Polish Radio.
Pfizer-BioNTech and Moderna vaccines based on mRNA technology will be used for booster shots nationwide, Kraska said.
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