A female Anopheles mosquito, a common vector for malaria, feeds on human skin. In a landmark study, researchers showed that genetically modified Anopheles gambiae mosquitoes could crash their own species in an environment mimicking sub-Saharan Africa, where the malaria-carrying mosquitoes spread.
The numerals in this illustration show the main mutation sites of the delta variant of the coronavirus, which is likely the most contagious version. Here, the virus's spike protein (red) binds to a receptor on a human cell (blue).
Juan Gaertner/Science Source