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Replies.
(а) In some cases—after people suffering from disease had visited them.
In other cases could not find any definite cause.
(b) No. Only theories
(c) Air passages get affected in bulk of cases.
(d) No positive evidence.
(e) In such a widespread infection it is very hard to get good evidence,
but 1 had one woman—an invalid—who lived alone with her husband in
the house, who escaped infection. She went for a walk with her husband
one day, and developed symptoms within twenty-four hours.
Qucstion 4.—Duration of incubation period ?
Replies.
(a) A few hours.
(b) Ten days. Others, very short time ; few hours, say, twelve.
(c) Short. One to two days.
(d) About forty-eight hours.
(e) Very brief. In many cases only an hour or two.
(f) Two days.
(g) Prom two to seven days.
(h) Three or four days.
(i) As far as I know—in a few cases very short, 24 hours.
(j) No real evidence. I should say, short.
Question 5.—Duration of infectivity ?
Replies.
(а) Apparently very short.
(b) Query.
(c) About seven days.