Michał Dworczyk, the prime minister's top aide, said on Twitter: “Due to testing positive for COVID-19, I will be working remotely in the near future.”
He added: “Let's follow sanitary rules and get vaccinated!"
Poland on Monday reported 3,890 new coronavirus infections and 17 more deaths, bringing its total number of cases during the pandemic to 1,642,658 and fatalities to 42,188.
Meanwhile, a total of 2,715,159 COVID-19 vaccine shots have been administered around the country so far, including 14,973 over the last 24 hours, according to the latest official statistics.
Dworczyk has previously said that the top priority is to vaccinate as many Poles as possible within the shortest possible time.
A plane carrying a fresh supply of around 390,000 doses of a COVID-19 vaccine developed by US pharmaceutical firm Pfizer and its German partner BioNTech arrived in Poland on Monday.