There are three patterns of acute sinusitis:  Persistent cold symptoms. If symptoms get better in 10 days, the infection is probably viral. âBut if thereâs no improvement after 10 days, itâs likely to be bacterial at that stage,â Dr. Rosenfeld said.
Electric Tools Employees using electric tools must be aware of several dangers. Among the most serious hazards are electrical burns and shocks. Electrical shocks, which can lead to injuries such as heart failure and burns, are among the major hazards associated with electric-powered tools.
Hazards of Mercury in the Workplace. (There are 3 forms of mercury: elemental mercury, inorganic mercury, and organic mercury. Organic or methyl mercury is the most hazardous.) The mercury we usually encounter is elemental mercury also known as metallic mercury, liquid mercury, liquid silver, and quicksilver.