KIEV, Jan 30 (Reuters) - Ukrainian President Viktor Yanukovich has gone on sick leave with a respiratory ailment, his website said on Thursday, with the issue of a new prime minister still undecided.
"The president of Ukraine has been officially registered as sick with an acute respiratory ailment and a high temperature," the web site said.
Yanukovich's prime minister, Mykola Azarov, resigned on Tuesday in the midst of mass street unrest and the president has yet to appoint a successor. Serhiy Arbuzov, who was Azarov's first deputy, has stepped in as interim prime minister.
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