This outbreak of Ebola has killed more than the SARs outbreak. I'm presuming that's what you mean by more deadly. The official death toll from this Ebola outbreak was 3439 as of 3rd of October; it may well be over 4,000 by now (7th Oct). The official data tells us the SARs outbreak killed 775 people. read more
SARS is much more dangerous in terms of outbreak potential to the US than ebola. read more
Before the current outbreak of Ebola virus, there was SARS. More than a decade ago, it blew up across East Asia and spread to Canada and the United States. The SARS outbreak, which raged for several months before it was quashed in July 2003, sickened nearly 8,500 people, claimed 900 lives and cost an estimated $40 billion to the economies it rocked. read more