Thailand's public health ministry has sent 300,000 additional masks to eight northern provinces shrouded in haze pollution, even as the provincial health authorities estimate that as many as two-thirds of local residents now have respiratory complaints, serious allergies and colds, reported Thai news agency (TNA) today. Deputy Public Health Minister Morakot Kornkasem led a team to visit patients with respiratory illnesses in hospitals in Lampang, Chiang Rai, and Phayao today. He said that the North's average level of the air pollution is still higher than the maximum permitted by health standards, and more patients come daily to receive medical treatment at the region's hospitals. Dr. Morakot said in Lampang, dust particles were measured at 152. 6 microgrammes per cubic metre, against the health standard of 120 microgrammes. There were 1,578 patients with respiratory illness visiting the hospital from March 1-14, 2007. No severe illnesses were reported, but two-thirds had colds. In Chiang Rai, some 12,000 cases of colds and eye irritation were reported. About 120,000 masks are needed for children, the elderly, and patients with asthma and heart disease. -- SPA