Summarize this content to 2000 words in 6 paragraphs Loading“We have explored multiple hypotheses with the input of local and international experts in the field, but to date, none of these investigations have revealed a causal link to the recent industrial fire.”Legionnaires’ disease is a severe form of pneumonia caused by inhaling small water droplets in the air or soil containing the Legionella bacterium. The incubation period is two to 10 days and it is not spread person-to-person.Looker said a single cooling tower in the Laverton North and Derrimut area was the likely source of the outbreak, as it would be unusual for multiple towers to be affected.As a result, the Bureau of Meteorology has been called in analyse how weather patterns may have increased the spread past the normal 500-metre radius.Loading“People would be aware that we’ve had a very cold July,” Looker said.“The bureau has described quite a strong thermal inversion pattern around the middle of July, and I understand that that could contribute to much broader dispersal of low-lying air…and broader distribution of fine water droplets from a cooling tower.”Looker said that because the colony of bacteria may have died, the Health Department may never find the definitive source of the outbreak.In most of the cases, people were exposed to the disease between July 5 and July 20. They developed symptoms on or after July 15.
