The Voice of Chandigarh News:

Poland has lifted most of its Covid-19 travel restrictions, including the quarantine requirements for travelers arriving from EU/Schengen and non-EU/Schengen countries with immediate effect.

In addition to this:

Proof of vaccination and negative test result is no longer required upon entering Poland
Completing the Passenger Locator Form is no longer required
Masks are no longer required in indoor spaces, public transportation, airports, stores, office buildings, tourist attractions, etc. However, masks are still required in health care environments such as hospitals etc.