The simplest way to prove your vaccination is by saving it in a digital wallet on your phone. In addition, you can save even more time by creating a shortcut that immediately opens your pass.
Here's how, starting from the moment you receive your vaccine pass in an email from the Ministry of Health.
First, open the email on your phone. What you do next depends on if you have an Apple phone, or an Android (basically, any smartphone that isn't an iPhone).
Check whether you have the Google Pay app. It comes pre-installed on many Android phones, but is sometimes just called "Pay". On some phones, you may have to install the app from the Google Play store first.
Note that you can use Google Pay for your pass without loading a credit card to it (although the app will try to convince you to).
Update: We've heard several reports that when a Samsung brand phone is switched off or restarted, the shortcut to My Vaccine Pass is likely to disappear. If this happens to you, try adding Google Pay to your home screen instead, rather than troubleshooting the problem (we couldn't find any solutions online).