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A white-tailed fawn in the northeastern United States showed evidence of exposure to SARS-CoV-2
.
Coronavirus is circulating in common American deer
One-third of white-tailed deer (Odocoileus virginianus) in the northeastern United States have antibodies against SARS-CoV-2, which indicates that they have been infected with the virus
.
These findings were published in a preprint on July 29, 2021 ( https://doi.
org/gmc8t6 ).
This is the first time that widespread exposure to the virus has been found in a wild animal population
.
People are worried about the emergence of a new animal "host"-animal populations carrying the SARS-CoV-2 virus
.
Previous laboratory experiments have shown that white-tailed deer can be infected with the coronavirus and spread it to other deer
Scientists from the United States Department of Agriculture in Fort Collins, Colorado and Ames, Iowa tested 385 deer blood samples from January to March 2021 in Michigan, Pennsylvania, Illinois and Part of the regular wildlife monitoring collected by the State of New York
.
They found that, surprisingly, 40% of the samples contained SARS-CoV-2 antibodies, which were produced in response to infection
Testing of archived samples also found antibodies in three samples in early 2020, when SARS-CoV-2 began to spread in the United States
.
In total, one-third of 2020 and 2021 samples contain virus antibodies
It is unclear how the deer was exposed
.
It may be through contact with people, other animals, or even contaminated wastewater
The researchers said that the rapid exposure of large numbers of animals to the virus is worrying, but more research is needed to assess whether deer can infect each other in the wild—and other species
.
"This is an interesting observation, but it still needs to be explained carefully," said Aaron Irving, an infectious disease researcher at Zhejiang University in China
A brief cell phone reminder that the COVID-19 vaccine can increase the vaccination rate
.
SMS push can increase COVID vaccination
A California study of more than 90,000 people showed that text messages reminding people to book COVID-19 vaccination can increase vaccination rates by several percentage points
.
The reminder sent one day after an individual was eligible for the vaccine, compared with the other group who did not receive the reminder, the appointment and vaccination rates increased by 6 percentage points and about 3.
6 percentage points, respectively ( https://doi.
org/gqtk; 2021 )
.
One week after the second reminder, the appointment rate and the injection rate of those who still did not make an appointment for vaccination increased by 1.
The researchers tested reminder text messages composed of two different texts, which were sent to members of a large healthcare system
.
Some people receive a "basic" reminder that they can be vaccinated
Ownership reminders are more effective: when people are sent one day after they are eligible for vaccination, the vaccination rate increases by about 4.
1 percentage points, while the "basic" reminder only increases by 3 percentage points
.
According to the authors, these small results, if applied to a large population, could speed up the vaccination of millions of people
.
A staff member at the Sheba Medical Center in Israel is preparing a dose of Pfizer Biotech's COVID-19 vaccine
.
A few months ago, breakthrough cases among health care workers vaccinated at the center were rare
Blood markers predict possible new coronary cases
According to a study of more than 10,000 medical workers who have received Pfizer Biotechnology vaccine injections, people who are fully vaccinated with COVID-19 vaccine have a relatively high level of virus-blocking antibodies, and they are less likely to be infected with the coronavirus.
( https://doi.
org/gmc77b )
.
There is increasing evidence that a person's "neutralizing" antibody level can predict whether the person will be infected
.
"Neutralizing" antibodies can prevent SARS-CoV-2 from infecting cells
.
A strong predictor can help regulators approve new vaccines without the need for large-scale clinical trials
.
It can also help them assess the need for enhanced injections to prevent virus mutation
.
Myles Davenport, an immunologist at the University of New South Wales in Sydney, Australia, said the study "is an important step in further verifying the use of neutralizing titrants
.
"
But this analysis does have flaws
.
It is based on a small number of cases among young people and healthy adults, which limits its application
.
It also does not indicate specific antibody levels related to protection
.
