Children engaged in child labour in tobacco growing are involved in many types of tasks, as shown in the Report on Child Labour in the Tobacco Growing Sector in Africa (2000). Childrenâs health, wellbeing, and opportunities for a better life are often the cost of childrenâs involvement in hazardous child labour. 2  Child labour in tobacco growing can pose health risks, including green tobacco sickness, which can cause fatigue and nausea.
Clinical Features The incubation period of pertussis is commonly 7â10 days, with a range of 4â21 days, and rarely may be as long as 42 days. The clinical course of the illness is divided into three stages.
Incubation Period. The incubation period, or time from clinical exposure to the onset of clinical signs, is approximately 2 to 4 days for CIV. This is a relatively short incubation period that is similar to that of influenza infection in other species.However, it is shorter compared to other causes of acute respiratory disease in canines, such as canine distemper and Bordetella bronchiseptica.his is a relatively short incubation period that is similar to that of influenza infection in other species. However, it is shorter compared to other causes of acute respiratory disease in canines, such as canine distemper and Bordetella bronchiseptica.