In Warsaw, protesters marched from the office of Ordo Iuris, a conservative group that has pushed for a full abortion ban, to the parliament building, which was surrounded by police officers in riot gear.

Duda's infection comes as the country faces a surge in the COVID-19 epidemic, with new infections hitting a daily record of more than 13,600 on Friday.

For the past year, Poland has seen a dramatic rise in the number of towns and municipalities declaring themselves 'LGBT-free zones.' 

The protests came a day after LGBT rights supporters in Warsaw scuffled with police who arrested a transgender activist, Malgorzata Szutowicz.

Duda received 51.03 per cent of Sunday's vote, while Trzaskowski got 48.97 per cent, according to final results Monday from the state electoral commission.

Incumbent President Andrzej Duda is backed by the ruling right-wing party and the government, as he seeks a second 5-year term.

President Donald Trump welcomed Poland's president, Andrzej Duda, to the White House on Wednesday.

The election must be held within 60 days of this announcement, or by late July, according to the resolution by the State Electoral Commission.

U.S. President Donald Trump said Tuesday he was "very seriously" considering a greater U.S. troop presence in Poland as he conferred with a top NATO partner at the White House.

President Andrzej Duda said Monday that he would never allow Poland and Poles in general to be "vilified" though "false accusations."