Which of the following diseases appeared as public health concern in the last quarter of 20 th century
A. HIV
B. Ebola virus
C. Escherichia coli O157:H7
D. All of the above
Answer:D
Which of the following diseases appeared as public health concern in the last quarter of 20 th century
A. HIV B. Ebola virus C. Escherichia coli O157:H7 D. All of the above