A brand new, preliminary genetic evaluation means that the present Ebola outbreak in Guinea could have originated with a survivor of the 2014-2016 West African Ebola outbreak, fairly than from an animal-to-human transmission.

In response to the pre-print report, the outbreak doubtless began with the survivor infecting a sexual companion with the lethal virus by means of semen — after the virus lay dormant within the man for at the least 5 years.

The evaluation, posted on-line Friday, was performed by scientists from Guinea, the Institut Pasteur in Senegal, the College of Nebraska Medical Heart, the College of Edinburgh, and the corporate PraesensBio.

In response to the Infectious Ailments Society of America (IDSA), the longest an Ebola survivor was believed to have shed the virus was about 500 days.

The earlier Ebola outbreak resulted in 28,000 circumstances and 11,000 deaths, primarily in Guinea, Liberia, and Sierra Leone, in keeping with the brand new report. The present outbreak in Guinea has resulted in 18 circumstances and has killed 9 individuals, in keeping with The New York Instances.


The information is “sobering,” mentioned William Schaffner, MD, a communicable illness epidemiologist and pandemic preparedness knowledgeable at Vanderbilt College in Nashville.

“Who would have thought that the Ebola virus may stay latent in an individual — a male — for five years after which set off one other outbreak?” Schaffner mentioned. “Till this information got here in, I believe all of us thought this newest Ebola outbreak was a consequence of an introduction from an animal species.”

“This provides a complete new public well being resonance to the notion that male Ebola survivors are a possible reservoir of this an infection for a few years,” he mentioned.

Schaffner mentioned that the testes, along with the eye and the central nervous system, are areas within the physique the place the Ebola virus is understood to cover.

Widespread Vaccination?

The brand new report raises the query, he mentioned, about whether or not among the previous outbreaks in Africa weren’t launched from the wild however as a substitute occurred as a result of a survivor initiated the an infection in a companion.

The actual hazard of the virus mendacity dormant within the testes, fairly than the eye or within the nervous system, is that it could possibly be transmitted to somebody sexually, Schaffner mentioned.


The findings within the genetic evaluation may exacerbate the stigma for survivors, he mentioned.

It additionally raises the query about whether or not widespread vaccinations are wanted in equatorial Africa, he mentioned.

Moreover, regardless that Ebola vaccines are very efficient, he mentioned, it is not identified how lengthy they might shield individuals.

One other public well being measure could also be selling extra condom use, he mentioned, which comes with its personal set of difficulties.

In gentle of this newest information, male survivors will transfer into the analysis highlight, Schaffner mentioned, and volunteers will probably be requested to supply semen specimens to search out out whether or not this can be a one-time occasion or one thing that occurs generally.

Michael Ryan, MD, govt director of the World Well being Group (WHO) Well being Emergencies Programme, mentioned in a briefing on Friday that the WHO has despatched greater than 30,000 vaccine doses to the nation.

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