If you want to track this awful corona virus situation on your iPhone, you can get Healthlynked COVID-19 Tracker iOS app for free via App Store.
The app by Healthlynked healthcare company informs you about numbers of corona virus cases in your area and worldwide using simply numbers or via an interactive world map. The COVID-19 Tracker also features a news feed covering the virus, as well as a chat section where you can discus about it with other users of the app.
The app seems to be totally legit. It relies on official data by World Health Organisation (WHO). I have tried the app on my iPhone and it seems to have accurate and up to date info on COVID-19 numbers.
The app is also available for Android devices via Google Play store.