Public health authorities said that 16,383 adverse reactions had been reported among those who received the vaccines by Saturday morning.
Meanwhile, a total of 594,507 doses have been wasted in the rollout, according to the Polish health ministry.
As of Saturday, Poland had injected over 20.9 million first doses of COVID-19 vaccines, while more than 20.5 million people had been fully inoculated, health ministry data showed.
The tally includes two-dose vaccines from Pfizer-BioNTech, Moderna and AstraZeneca as well as Johnson & Johnson's one-shot vaccine.
Poland on Saturday reported 25,576 new coronavirus infections and 502 more deaths related to COVID-19, bringing the country's total number of cases during the pandemic to 3,649,027 and fatalities to 85,630.
At the start of last month, third doses of the COVID-19 vaccine were made available to all adults in the country.
The booster shot is administered at least six months after full vaccination, using Pfizer-BioNTech and Moderna mRNA vaccines.
For people aged over 50, the minimum recommended interval is five months, under rules recently announced by public health authorities.
By Saturday, a total of 3,262,579 booster shots had been administered, government data showed.
Prime Minister Mateusz Morawiecki encouraged Poles to get vaccinated against COVID-19 after receiving his booster shot for added protection this week.
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Source: IAR, PAP, gov.pl