source control

source control (uncountable)

1. (computing) A technology that handles access to computer files containing source code so that several users can work on the files without interfering with each other's changes.
2. (medicine) Measures applied to the source of an infection to reduce further contamination and spread.
3. (epidemiology, public health) Measures applied to potentially-infected people that reduce their chances of infecting others.
   • 2020 April 22, Zeynep Tufekci et al., “The Real Reason to Wear a Mask”, *The Atlantic* (online):

     But the opposite concern also exists: egress, or transmission of particles from the wearer to the outside world. Historically, much less research has been conducted on egress, but controlling it—also known as “source control”—is crucial to stopping the person-to-person spread of a disease. Obviously, society-wide source control becomes very important during a pandemic.

• (computing): check in, check out, commit, repo, repository
• (epidemiology, public health): target control, reservoir control