Siv Gun Elisabeth Andersson (born 1959) is a Swedish evolutionary biologist, professor of molecular evolution at Uppsala University.
[6] She became professor of molecular evolution in 2000, at the Uppsala University's Evolutionary Biology Center.
[2] Andersson has been very active in developing the Swedish national center for large-scale research Science for Life Laboratory, especially its DNA sequencing and bioinformatics platforms.
[5] During the 2020 COVID-19 pandemic, she contributed, together with Lars Engstrand and with the financial support of the Knut and Alice Wallenberg Foundation, to establish the first large-scale testing facility in Sweden[8][9] Andersson's research first focused around the role of codon usage in shaping bacterial genomes.
[10] After her postdoctoral fellowship, she contributed to sequence one of the first genome of an obligate intracellular parasite, Rickettsia prowazekii, the causative agent of epidemic typhus.