Mesothelioma is a non-infectious environmental disease caused by exposure to asbestos - HSC - SSCE Biology - Question 16 - 2023 - Paper 1

To find the incidence rate, we can use the formula:

$\text{Incidence Rate} = \frac{\text{New Cases}}{\text{Total Population}} \times 100$

Given:

• New Cases = 642
• Total Population = 26,000,000

Substituting the values:

$\text{Incidence Rate} = \frac{642}{26,000,000} \times 100$

Calculating:

$\text{Incidence Rate} = \frac{642}{26,000,000} \times 100 \approx 0.00247\%$

Rounding to four decimal places, this gives us approximately 0.0025%.

Hence, the correct answer is C. 0.0025%.