Because the Clinical School Computing Service uses Sophos Endpoint Protection on our managed computers, the Sophos Home Premium package is available free to home or personal devices to people with @medschl or @slcu email addresses. 

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https://home.sophos.com/en-us/landing/commercial-use.aspx

Other Free Antivirus for UoC Staff and Students:

Staff and Students at the University of Cambridge can also get McAfee (now called Trellix) for free to use on computing devices. Please see this link: https://help.uis.cam.ac.uk/service/security/antivirus

Mobile Devices:

You can download Sophos Intercept X for free for iOS and Android devices from the respective app stores.  While they are not linked to your Sophos Home Premium account, the applications provide a good level of support plus features like password safe, password generator, safe QR code scanning, web filtering and an authenticator app.