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.
An incubation period refers to the amount of time between the moment a person or animal is exposed to a bacteria or virus and the appearance of the first symptoms.However, an incubation period can also refer to the length of time necessary for oviparous animals to develop while inside the egg.epatitis A can have an incubation period of up to 50 days, while for rabies, the incubation period can be as long as one year. Diseases with shorter incubation periods include the common cold, dengue hemorrhagic fever and cold sores or herpes, with an average of 10 hours.