COVID-19 virus modified by mink
“The problem is that we do not, yet, know how the virus is being modified in mink,” Viljoen said. “Right now, despite the genetic changes crossed by the transmission to and from mink, the virus strain has only become slightly less sensitive to human neutralizing antibodies, but this could change. If the virus changes its structure while adapting to multiple hosts, it can become highly pathogenic and more fatal to people once it comes back to humans.” This could pose a risk to the efficacy of future vaccines.
Since June 2020, 214 human cases of COVID-19 have been identified in Denmark with virus variants associated with farmed mink, according to the World Health Organization (WHO). Similar infections were reported from mink farms in Spain, Sweden, Italy and the Netherlands. The virus identified in Denmark had a combination of genetic mutations that had not previously been observed. It is not clear at this point whether this new strain is more dangerous for humans, but the virus has shown decreased sensitivity to antibodies able to neutralize virus infectivity.
Mink are the first animal species identified that can be infected by people and vice versa – but they may not be the only ones. The IAEA, which has already assisted over 120 countries by transferring knowledge and equipment to detect the virus that causes COVID-19, has for decades been supporting veterinary laboratories in developing countries in serological and molecular detection techniques, as well as in the genetic sequencing and characterization of viruses, including coronaviruses in both animals and people (see Coronaviruses in the 21st century).
Nuclear-derived tools, such as RT-PCR, are being utilized in the situation surrounding mink and the farmers tending to mink in Denmark.