Antibodies to the virus that causes the COVID-19 disease in humans, SARS-CoV-2, were found in 40% of white-tailed deer across four US states, according to a new study.Â
The deer were chosen because they are often in close proximity to urban areas and also have a receptor named ACE2, which is the molecular foothold through which the virus enters human bodies.
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The study was carried out by researchers from the National Wildlife Research Center, part of the US Department of Agriculture’s Animal and Plant Health Inspection Service (USDA).
The researchers analyzed serum samples taken from 385 white-tailed deer from Pennsylvania, Michigan, Illinois, and New York. Out of 154 deer, nearly 40%, were found to have SARS-CoV-2 antibodies.
The first traces of the antibodies appeared in January 2020, which corresponded to the beginning of the virus’ spread to the US.
The presence of antibodies does not necessarily mean that the deer had contracted the virus, or that they could pass it to humans. Â
Additional studies would need to be carried out to search for viral RNA in order to determine this.
Still, the researchers recommend taking extra precautions against touching or approaching wildlife.
Studies conducted until now have shown that some small mammals such as deer-mice and skunks can contract the virus, and some such as minks can infect humans, according to the Philadelphia Inquiry. However, other species in the same circumstances could not spread the virus.
Once peer-reviewed, the study could encourage additional research of its kind that may broaden scientists’ understanding of the virus, the researchers hope.
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