AFP correspondents in Kiev and the western city of Lviv said there had been long queues outside pharmacies in the past days as the population stocked up on anti-flu masks.
Many students whose courses were cancelled in Lviv and Ternopil left the cities, while those who remained were frequently seen wearing masks in public places.
Lemons, a traditional anti-flu remedy, sold out at markets in Lviv while supermarkets were selling them at double price.
There is currently only enough anti-flu medication in Lviv to last three to four days but central authorities have promised to make additional deliveries, said Lviv governor Mykola Kmit.
Tymoshenko will travel to the affected western Ternopil region later Friday to visit the "epicentre" of the epidemic, a government statement said.
The country's politicians, including Tymoshenko, have just started official campaigning for presidential elections scheduled for January 17.
The prime minister on Saturday held a mass outdoor rally in the centre of Kiev attended by tens of thousands of people to mark her party's confirmation of her candidacy in the presidential race.
President Viktor Yushchenko, Tymoshenko's political arch-rival who is also standing in the elections, was due to hold his own rally on Sunday but it is now unclear whether this can go ahead.
Residents of Kiev meanwhile were asking pharmacies for masks and medication but these were not always to be found in stock.
Source-AFP
SRM