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Introduction to Epidemiology

Question 1: At a dinner party, a total of 125 people ate the roasted chicken. Among them,

45 who consumed roasted chicken became ill while the others were healthy. Calculate the

Attack Rate.

The attack rate is computed by dividing the total number of persons exposed to the risk factor,

which in this example is roasted chicken, by the number of people who fell ill. Typically, the

assault rate is reported as a percentage.

We may use the following method to compute the attack rate for this outbreak:

Attack rate = (Number of people who became ill) / (Total number of people exposed) * 100

Attack rate = 45 / 125 * 100 = 36%

As a result, the outbreak’s attack rate is 36%. This suggests that 36% of those who ate the roasted

chicken became sick.

It is vital to emphasize that the attack rate is only one indicator of illness risk. Other

considerations, such as the severity of the sickness or the amount of time the individual has been

unwell, are not considered.

Question 2: In a university, there are 2100 students, 1400 are boys and 700 are girls. What

is the sex ratio?

The sex ratio measures the proportion of men to females in a population. It is computed by

dividing the total number of men by the total number of females and multiplying by 100.

The sex ratio can be computed for a whole population or for specific subgroups, such as distinct

age groups, ethnic groupings, or socioeconomic groups. The sex ratio can also be computed for

various geograp …

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