51.   He began experiencing symptoms of a stroke a night earlier.

52.   It can be deadly to the elderly or young children and can cause stillbirths and miscarriages in pregnant women, even if they experience no symptoms.

53.   It can cause miscarriages and stillbirths even if the mother experiences no symptoms.

54.   It also can cause miscarriages or stillbirths even if a pregnant woman experiences no symptoms.

55.   Mandela is not currently sick and he is not experiencing any symptoms.

56.   Mandela, who is not currently sick and is not experiencing any symptoms, began radiation treatment Tuesday.

57.   Some lawmakers question the value of such warnings because it is hard to stop transmission of HPV during sex and those infected often experience no symptoms for decades.

58.   Some never experience symptoms - a doctor just spots the condition during an exam.

59.   Some never experience symptoms -- a doctor just spots the condition during an exam.

60.   The bacteria is particularly dangerous for pregnant women, because it can cause miscarriages and stillbirths even if the mother experienced no symptoms.