Hi Sincerely seeking some professional advice here. I have been exposed to an incident of inhaling silica dust for some 2 hours at a quartz, granite, marble polishing and grinding foundry [as I was tasked to select marble for our new office renovation]. The dust concentration in the enclosure is strong in my opinion (air is of a dusty white fog with strong smell of the stones). Now I noticed phelgm and mild coughing. Do I need an X-Ray examination for symptoms of silicosis? Also, since silica gets retained would anyone who inhaled silica dust, even if of a one off incident eventually develop symptoms of silicosis? Thank you