The chief executives of Abbott Laboratories and Thermo Fisher Scientific Inc have told Amazon they would like to work with the e-commerce company, though the U.S. government is taking up all of their testing capacity at present, the notes said. The nature of Amazon’s conversations with the test makers and the exact assistance they might offer were unclear. The document separately indicated Amazon is looking into the ability to screen more than one person at a time for the virus, and it also wants to partner with a medical organization in its testing efforts.