3.5 Impact on Different Age Groups

There are many reasons why infectious diseases impact some people more than others. Individual immunity matters a lot when it comes to resisting and countering infectious diseases, and age is a big factor that influences a person’s immunity. So, we see epidemiological patterns in the population regarding different age groups.

Mostly, infectious diseases have the lowest severity among school-going children aged 5 to 14 years. This severity rises for young adults in their 20s. There are always exceptions, however. For example, dengue was marked as being more persistent in school-going children than adults.

Immunity also starts falling in old age, and this decreased immunity puts people of old age at a greater risk of contracting infectious diseases. With increasing age, antibiotic resistance is also increased along with atypical signs of diseases that make it more complicated to be diagnosed and treated.

With different age groups comes varying levels of exposure and general lifestyle. Young adults are more likely to travel and socialize, putting themselves more at risk of being exposed to new pathogens.

In addition to age, stress, environment, and genetics also play a role in the spread of infectious diseases in populations.

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