Ebola virions (virus particles).

The Ebola virus was found in the semen of survivors in 2015, and the publication raised new alarm of whether another outbreak could flare up as a result of sexually-transmitted cases.

But it turns out the same survival tactic that the virus uses – hiding in the testes of men, thereby dodging the immune system – is also used by more than two dozen others, according to a new study by Oxford University scientists.

“The presence of viruses in semen is probably more widespread than currently appreciated, and the absence of virus in genital secretions should not be assume for traditionally non-sexually transmitted viruses,” write the two scientists in the CDC journal Emerging Infectious Diseases.

Their look began with some of the findings of Zika virus RNA in semen of the infected. The material persisted longer than had been previously understood.

Their meta-analysis involved more than 3,800 studies found with targeted searches in PubMed.

The viruses spanned from latent and chronic infections to acute infectors. The list included the understood and known STDs – as well as some new and surprising inclusions.

So while the human herpes viruses, HIV, and Hepatitis B and C, it also included the Lassa fever virus, the Rift Valley fever virus, the Marburg virus, the varicella zoster virus and the Mumps virus, among others.

Also included in the list: Epstein Barr virus, Simian virus 40, Human T-cell lymphoma virus 1, the simian foamy virus, and the Chikungunya virus, among others.

But others may still be transmittable, since they have been found in testes previously. The potential STD list, pending further studies of the topic, may soon include: influenza virus, coxsackie B virus, systemic acute respiratory syndrome (SARS) virus, smallpox virus, and rubella virus, among others.

“The investigation of virus detection and persistence in semen across a range of viruses is useful for clinical and public health reasons, in particular for viruses that lead to high mortality or morbidity rates or to epidemics,” they conclude.