Charity has swollen glands and a bright red tongue. she has:
pneumonia
tuberculosis
scarlet fever
whooping cough

Charity has scarlet fever because having swollen glands and a red tongue are symptoms of this disease. This type of disease is caused by a steptococcusor infection, a type of bacteria that generally affects a small percentage of people who have strep throats or streptococcal skin infections. The disease can be treated with antibiotics and is considered only as a mild illness but it should be treated quickly to prevent serious long-term health problems. It usually affects 5-15 year olds where the classic symptom of the disease includes a red rash that feels rough like sandpaper. 

What happens to the influenza virus every 20-40 years and why?