NEW YORK (GenomeWeb) – The Lassa virus, unlike its Ebola cousin, appears to have ancient origins and its appearances in humans seem to mostly be due to reservoir-to-human transmissions, according to an analysis of some 200 Lassa virus sequences.

"The reason Lassa hasn't yet grown into this huge epidemic is because there is limited transmission between humans," first author Kristian Andersen from the Scripps Research Institute said in a statement. "That's a major difference between Lassa virus and Ebola virus."

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Researchers hope to tease out the signature effects that different carcinogens leave on the genome to determine their contributions to disease, Mosaic reports.

The Wall Street Journal looks into the cost of new gene therapies.

An Imperial College London-led team reports that it was able to use a gene drive to control a population of lab mosquitos.

In PNAS this week: genomic effects of silver fox domestication, limited effect of mitochondrial mutations on aging in fruit flies, and more.