HBV is transmitted to carrier mothers by perinatal contact with body fluids such as blood and lymph , as well as through parenteral exposure of infants .
HBV is transmitted by parenteral contact with body fluids , such as blood and lymph ; perinatal exposure of infants to carrier mothers .

Are these two sentences paraphrases of each other?
Choose your answer from:
(a). no.
(b). yes.
(a).