I feel like the best answer would definitely be that it can take 5 to 10 years to occur
Answer:
Tobacco can affect the excretory system by causes colorectal cancer.
Explanation:
The exact cause of colorectal cancer is not clear, but certain risk factors, including diet, cigarette, smoking and heavy alcohol consumption and using tobacco are strongly linked to the disease.
Individuals with other genetic cancer syndromes or a family history of colorectal cancer may have a high chance of developing the disease.
Scientists are creating vaccinations that prevent people from getting bird flu. If the virus mutates, a new vaccine needs to be made. The vaccine needs to be tested, which can be dangerous. It also takes a long time for scientists to know whether the vaccine works.