Things that are freeze-dried: Astronaut food. Emergency rations. And, just maybe, some future COVID-19 vaccines.
Freeze-drying is a method for removing water from a product. First, you freeze the item you’re trying to dehydrate, causing any water in it to become ice. Then, you remove the ice through a process called sublimation, in which ice turns directly into vapor under low pressure.
In a new study, scientists report that they have successfully freeze-dried a liposome-based liquid vaccine formula that could be developed for potential use in COVID-19 vaccines.
A vaccine that employs the freeze-dried liposomes is still a long way off. But if developed successfully, dehydrated doses could be shipped and stored at room temperature, eliminating logistical problems…
News Source: https://www.news-medical.net/news/20211201/Freeze-dried-liposomes-could-be-used-in-potential-COVID-19-vaccines.aspx