Freeze-dry Covid-19 test

Freeze-dry Covid-19 test

Subject: Science & tech

Context : Researchers have discovered that commercially available PCR tests can withstand the freeze-drying process, making them shelf-stable for up to 30 days and 50°C without sacrificing sensitivity and accuracy.

Concept:

• The researchers found that the testing reagents could be pre-mixed with a standard preservative, freeze-dried and then distributed and stored at room temperatures.
• When the test is needed, health care workers then add water to rehydrate the test for immediate use.
• Freeze drying : The same process used to make astronaut ice cream, freeze drying extends the shelf-life of perishable materials by freezing them and then dehydrating them by removing the ice
• The new strategy could help ease logistical challenges, making tests more available to help schools, businesses and sporting events safely reopen, the university said.
• It also could be a particularly powerful option for low-resource settings that lack access to reliable electricity and refrigeration.