alleryStart learning →Since RhoGAM was introduced in 1968, hemolytic disease of the newborn in the United States has fallen to about what level?
AAbout 5 percent
BAbout 2 percent
CAbout 0.1 percent
DAbout 13 percent
Answer & Solution
Correct answer: C. About 0.1 percent
1. Without preventive treatment the incidence in a subsequent Rh positive pregnancy runs at about 13 to 14 percent.
2. RhoGAM was introduced in 1968.
3. Since then the incidence has dropped to about 0.1 percent in the United States.
4. About 13 percent is the untreated figure and is the trap for a candidate who recalls only one of the two numbers.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 18 "The Cardiovascular System: Blood", section 18.6 Blood Typing_
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