“…On the other hand, we must remember that the disease may begin after puberty. In a series of over 4,000, reported by Bray (1937), the onset in 14.1 per cent was in the second decade; Unger and Wolf (1943) found 15.7 per cent; and there is general agreement that there is a marked preponderance of females over males among those who develop asthma at this time (Table 1). All that we can conclude, therefore, is that the chances of improved health are better for boys than for girls at the outset of their careers.…”