A team of researchers from the University of California, Berkeley, has developed a novel virus-based colorimetric sensor that can rapidly detect airborne viruses. The sensor, which is described in a paper published in the journal Nature Biotechnology, uses a genetically engineered virus to produce a visible color change when it comes into contact with a specific virus.

The sensor is based on a virus called M13, which is a harmless bacteriophage that infects bacteria. The researchers engineered M13 to express a protein that changes color when it binds to a specific virus. When the engineered M13 virus comes into contact with the target virus, the protein changes color, producing a visible signal that can be detected with the naked eye.

The researchers tested the sensor with a variety of viruses, including influenza virus, respiratory syncytial virus (RSV), and SARS-CoV-2, the virus that causes COVID-19. The sensor was able to rapidly and accurately detect all of the viruses tested.

The virus-based colorimetric sensor has a number of advantages over traditional methods of virus detection. It is rapid, accurate, and easy to use. The sensor can also be used to detect viruses in the air, which is important for preventing the spread of airborne diseases.

The researchers believe that the virus-based colorimetric sensor could be used to develop a variety of new diagnostic tests for viruses. The sensor could also be used to monitor the spread of viruses in real time, helping to prevent outbreaks.

"This technology has the potential to revolutionize the way we detect and respond to viral threats," said study lead author Dr. James Collins. "We are excited to continue developing this technology and exploring its potential applications."

The virus-based colorimetric sensor is a promising new tool for detecting airborne viruses. The sensor could help to prevent the spread of airborne diseases and improve public health.