CNN: China's Premier Wen Jiabao has said the battle against the deadly SARS virus remains "grave" and called for intensified efforts to contain it.

Wen was speaking during a visit to a hastily built hospital for SARS patients on the outskirts of Beijing where he warned "arduous work" lay ahead if China was to beat the disease. Around 25,000 people have been ordered into quarantine as part of China's effort to fight SARS.