Some random encounters change lives forever. But luckily for the 48 who had contact with Ebola victim Thomas Eric Duncan, the potentially deadly effect lasted just 21 days. They’ve been released from quarantine, disease free. Two nurses who treated Duncan remain ill. But a Spanish nurse appears to have recovered, a feared cruise-ship case has been ruled out, and Nigeria and Senegal have been declared Ebola-free. The Pentagon, meanwhile, is assembling a crack team of 30 caregivers to battle domestic Ebola emergencies.