Minimum duration of developing coal miners pneumoconiosis is –
Correct Answer: More than 10 years
Description: - The coal miners pneumoconiosis has two phases; first phase is simple pneumoconiosis which is associated with little ventilatory impairment. - this phase may require about 12 years of work exposure for its development. - second phase is characterized by progressive massive fibrosis Reference: Park's textbook of preventive and social medicine, 23rd edition, pg no:806 <p>
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Social & Preventive Medicine
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