Health workers in protective clothing await patients in the outpatient lounge of Redemption Hospital, formerly an Ebola holding center, in February 2015 in Monrovia, Liberia.

Despite recent headlines declaring the success of an experimental Ebola vaccine, the world is not fully prepared for future epidemics — and not in position to use vaccines to prevent another deadly outbreak, a report published Tuesday warned.

The report raised serious concerns about the work that remains to be done on Ebola vaccines.