A virologist says the vaccine is an essential first step and justifies some optimism . Professor Andrew Easton , a leading virologist at Britain 's Warwick University , told CNN that the trial was an `` essential first step '' toward a vaccine to prevent Ebola and justifies some optimism . All the volunteers in the first clinical trial of the vaccine produced anti - Ebola antibodies . None of the volunteers suffered serious side effects , the National Institutes of Health says . The vaccine carries genetic material from the virus , but there 's no evidence of viral infection .
A virologist says the vaccine is an essential first step and justifies some optimism . All the volunteers in the first clinical trial of the vaccine produced anti - Ebola antibodies . None of the volunteers suffered serious side effects , the National Institutes of Health says . The vaccine carries genetic material from the virus , but there 's no evidence of viral infection .