Asthma causes

[ad_1] New Delhi: The term “asthma” is derived from the Greek word ‘aazein’, which means “to exhale with an open mouth; to gasp.” This condition is the most common cause of school absenteeism, accounting for an estimated 14 million missed school days.  Bronchial asthma tends to have developed steadily since the 1970s, and it now … Read more