Doctors say that former Polish President and Nobel laureate Lech Walesa has pneumonia but that his condition is improving.
Tadeusz Jedrzejczak, deputy head of the hospital in Gdansk, said Monday that 67-year-old Walesa was diagnosed with a lung inflammation. He said the inflammation was limited to only one lung and that Walesa's overall condition is good.
Doctors initially could not determine Walesa's ailment.
Jedrzejczak said Walesa, the founder of the pro-democracy Solidarity movement, would remain in the hospital at least until the end of the week.
Walesa has a pre-existing heart condition and diabetes.