Local health officials have concluded that SARS is not a concern that the unexplained pneumonia that has occurred in Wuhan, central China, could be severe respiratory syndrome, SARS.

The Wuhan City Health and Welfare Commission's investigation into the pneumonia found that SARS and Middle East Respiratory Syndrome MERS, avian influenza, and the flu were not the cause.

He added that further investigation is still underway on the specific cause.

A total of 59 patients in China recently diagnosed as unexplained viral pneumonia, seven of whom are severe.

Basic research has not confirmed any cases of human-to-human transmission, and no medical staff has come into contact with patients.

The pneumonia suffered from many fish market merchants in Wuhan, where it is known to sell wild animals in addition to seafood.

In 2002-2003, SARS swept through mainland China and Hong Kong, killing 650 people, suggesting that SARS could be the cause of pneumonia.

At present, suspected patients are also coming from neighboring regions such as Hong Kong, Taiwan and Singapore, and health authorities are stepping up their boundaries.