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Spit It Out

Popular Science looks at three different technologies that use saliva. One detects amylase, which has been linked to sleepiness; another, coming out of the Human Salivary Proteome Project, aims to replace blood tests with spit exams; and lastly, Sandia National Laboratories is developing a spit-based chip to detect early-onset gum disease.

The Scan

Tens of Millions Saved

The Associated Press writes that vaccines against COVID-19 saved an estimated 20 million lives in their first year.

Supersized Bacterium

NPR reports that researchers have found and characterized a bacterium that is visible to the naked eye.

Also Subvariants

Moderna says its bivalent SARS-CoV-2 vaccine leads to a strong immune response against Omicron subvariants, the Wall Street Journal reports.

Science Papers Present Gene-Edited Mouse Models of Liver Cancer, Hürthle Cell Carcinoma Analysis

In Science this week: a collection of mouse models of primary liver cancer, and more.