Companies like Pfizer, Sanofi, Merck, AstraZeneca and MedImmune continue to disinfect with a safe SteraMist BIT chemical protecting their operator, facility and the environment, while providing the confidence to the American population that we will produce sterile vaccines.
Refer to the input text as context and select the correct relationship between 'MedImmune' and 'AstraZeneca' from the available options.
Options: original broadcaster, manufacturer, parent organization, platform