One hundred countries have imposed restrictions on travellers from the mainland, ranging from denial of entry to medical checkups.
The mainland reported five more Sars deaths and 146 new cases, bringing the death toll to 224 and the number of cumulative cases to 4,698.
The WHO issued travel warnings for Tianjin, Inner Mongolia and Taipei. It also said its experts would visit Guangxi and Henan after their tour of Hebei province. Shanghai reported its first death and imposed a two-week quarantine on people returning from infected areas.
The mainland has so far sacked or penalised more than 120 central and local government officials for their poor handling of the outbreak.
Up to 500 villagers near Chengde city who suspected a Sars patient was being transferred to their hospital overturned an ambulance and stoned the medical facility.
The Russian authorities have told airlines to stop selling flights to China and Taiwan and prepare for a complete ban on air links. Russia also has announced that it will seal off its border with China.
Hebei province has told officials to bow instead of shaking hands.
Yao Ming, the Houston Rockets basketballer, plans to host a telethon at the weekend in his hometown of Shanghai to raise money for Sars research.
The Japanese embassy in Beijing handed over the first batch of Japanese emergency aid, including medical supplies, to China.
The national university entrance examination taken by millions of mainland students each year will be postponed.
Quarantines at two Beijing universities were lifted.
David Riddington, 39, a New Zealander based in London, was released from a hospital in China's northern Shaanxi province.
A Taiwanese nurse who worked at a Taipei hospital that suffered a Sars outbreak has died, weeks before she was to deliver her first baby.
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