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They Might Be (Viral) Giants

A few years ago, researchers discovered the largest viral genome on the planet — that of the Mimivirus, which infects freshwater amoeba. It's genome contains more than 1 million base pairs, and encodes genes that had previously only been found in living cells, according to Ars Technica's John Timmer. Researchers recently discovered an oceanic cousin of the Mimivirus — the Cafeteria roenbergensis virus — that has the second-largest viral genome ever found in a single-celled host that preys on the bacteria and plankton in the water. The C. roenbergensis genome is more than 700,000 base pairs long, Timmer says, adding that its "ends are filled with repetitive DNA, which the authors speculate acts a bit like telomeres do in human cells."

At Byte Size Biology, Iddo Friedberg asks, "How much cellular machinery does a virus need to code in its genome to cross the border between life and non-life?"

The Scan

Not Kept "Clean and Sanitary"

A Food and Drug Administration inspection uncovered problems with cross contamination at an Emergent BioSolutions facility, the Wall Street Journal reports.

Resumption Recommendation Expected

The Washington Post reports that US officials are expected to give the go-ahead to resume using Johnson & Johnson's SARS-CoV-2 vaccine.

Canada's New Budget on Science

Science writes that Canada's new budget includes funding for the life sciences, but not as much as hoped for investigator-driven research.

Nature Papers Examine Single-Cell, Multi-Omic SARS-CoV-2 Response; Flatfish Sequences; More

In Nature this week: single-cell, multi-omics analysis provides insight into COVID-19 pathogenesis, evolution of flatfish, and more.