Some ambulance workers in Monrovia have been infected with Ebola, while others have been attacked for not getting to patients in time.CreditCredit...Ben C. Solomon/The New York Times MONROVIA, Liberia — Racing along cracked and bumpy roads here, Gordon Kamara shouted into his cellphone over the shrieking sirens of his ambulance. The phone had been ringing nonstop since 5 a.m. “Not today! Not today