Development of a hypothesis early in an outbreak: a) helps direct subsequent steps of an outbreak investigation and b) helps to determine early on if additional investigators should be involved in the investigation. (1 point)

A.True

B.False

The CLINICAL phase of a disease lasts from the biological onset to the development of symptoms. (1 point)

A.True

B.False

The prodromal period is when the signs and symptoms of a disease first begin to appear, but these are not yet clinically specific nor severe. (1 point)

A.True

B.False

A difference between primary and secondary attack rates lies in the denominator. Primary "attack rate" takes into account all individuals at risk, while the secondary attack rate only includes the contacts exposed to cases that were initially affected. (1 point)

A.True

B.False

23. The classic epidemic curve (cases vs time) for a point-source outbreak shows an upward slope that will plateau for an extended period before sloping downward (see picture) (1 point) O N H 5.. '8 a g a I. D .800 \"I Out 03' Its" lb\"! Hill MD 0:23 Juno an: m In mummm} A. True B. False