Revived “zombie” viruses do not infect humans

A prehistoric virus recently revived in a laboratory does not "zombifies" to its guests nor does it threaten to unleash a new pandemic, although this is indicated by users on social networks that magnify a disseminated study and omit details of the investigation to misinform.

EFE Verifica received a query through its WhatsApp channel (+34 648434618) about the veracity of a headline that reported that scientists had revived a virus "zombie" caught "in the permafrost".

The term was misinterpreted by various profiles on Twitter, TikTok and Facebook, which associated the experiment with science fiction ideas and revived theories of a "new pandemic" or even of a "apocalypse".

"They have already begun to build a narrative that justifies control of rights, appealing to protect collective health…..made in WHO, WEF and gangs (sic)"maintains a netizen on Twitter.

Similar messages are also shared in other languages ​​like English and Italian.

FACTS: The study shows that European scientists did revive several prehistoric viruses, but this has nothing to do with a doomsday scenario. They are called "zombies" because "resurrect" after thousands of years frozen in the ground, however, they do not infect humans but amoebas and the experiment was carried out in a controlled environment.


The research that is taken out of context in social networks was disclosed in February of this year in the magazine "viruses"a peer-reviewed publication to which some virology societies, such as the United States, Spain or Canada, are affiliated.

Most of the scientists from the University of Aix-Marseille (France) participated in this study, but also others attached to German and Russian institutes.

The document states that a technical team managed to make ancient viruses infectious again after being inactive in permafrost, a layer of soil that remains frozen in the coldest regions of the planet.

This had a purpose linked to the study of climate change, since the researchers warn that the thawing of the permafrost can release microorganisms capable of returning to life and eventually becoming a danger to public health.


However, the viruses that were managed to reactivate in the study only infect amoebas, contrary to speculation on social networks.

Specifically, the procedure achieved "get sick" to species of "Acanthamoeba spp."a microscopic, single-celled organism.

The scientists argue within the study that it was conceived precisely in this way to protect "from an accidental infection" laboratory workers and thus prevent the spread of an unknown disease.

"Viruses have a tropism, that is, a specificity towards the type of cells and the type of organisms that they can infect."Flor Pujol, a virologist and member of the Latin American Academy of Sciences, explains to EFE Verifica.

For this reason, not all viruses can affect humans. Some, for example, act exclusively on bacteria, plants, or animals, and it is considered quite unusual for them to switch hosts.

"To enter a cell they need to interact with a receptor, which is the virus key that enters the lock on the door of a specific cell."adds Pujol metaphorically.


The research report argues that the results with amoebas "can be extrapolated to many other DNA viruses capable of infecting humans or animals".

This is one of the main warnings of scientists.

However, another of the points that the document clarifies is that "it is still impossible to estimate how long these viruses might remain infectious once exposed to outdoor conditions"such as ultraviolet light, oxygen or heat.


In at least 2013 and 2014, researchers from the same group had already resurrected prehistoric viruses, as can be seen in an article in the scientific journal PNAS, the official publication of the United States National Academy of Sciences.

In that same magazine it is stated that Russian scientists, more than 10 years ago, also revived a plant from tissue found in the permafrost.


The study suggests that it is "legitimate to reflect on the risk that old viral particles remain infectious" and argues, among other things, why there is no universal treatment to treat viruses.

One of the project’s researchers, Jean-Michel Claverie, wrote in an article that "fortunately" Until now, very few people lived in the inhospitable places where the permafrost is thawing, making it "very improbable" an encounter between a virus and the host.

"A risk is always the combination of danger and exposure"mentions Claverie.

Also Catherine Dieleman, biologist specializing in permafrost and professor at the University of Guelph (Canada), told EFE Verifica that although "it can make our imagination run wild to think about the impact of frozen microbes"it must be remembered that not only ancient microbial life is unknown, but also current "is minimally characterized".

In relation to this, the UN published in 2020 an entry on its website about experts who warned that 1.7 million viruses currently "not discovered" they live in mammals and birds, "of which up to 850,000 could have the ability to infect humans".

For his part, the Swiss scientist Beat Frey, a permafrost scholar, consulted by EFE Verifica, said: "I am not so convinced that ancient viruses are capable of infecting humans".


The answer is no, according to virologist Flor Pujol.

"Some viruses have a greater potential to generate a pandemic due to their mechanism, their transmission abilities and the possibilities that the person becomes infected."highlight.

What determines the potential of a virus to become a pandemic is the level of exposure that human beings have to it, explains the Colombian infectologist Juan Cortés Luna.

In the case of a new virus, the doctor points out, it is true that the threat grows because humans do not have an immune response. However, there are other factors to take into account such as transmissibility.

"The more transmissible the virus is, the more efficient it is"he argues.

In any case, Cortés Luna points out that "It would be necessary to know how much the prehistoric virus resembles a current virus".

In conclusion, the prehistoric virus recently revived in a laboratory does not "zombifies" to its guests nor does it threaten to unleash a new pandemic, although this is indicated by users on social networks that magnify a disseminated study and omit details of the investigation to misinform.

Recent Articles

Related News

Leave A Reply

Please enter your comment!
Please enter your name here