Ion Checkbox

Hi, I want to, in my ANGULARFIRE application, get users medical history by showing them checkbox for each disease.The disease model contains isChecked: boolean which should be toggled. If they have got the disease, they will tick the box and it will trigger isChecked to TRUE. All ticked values should be stored in firestore along with all the unticked checkbox.
Then, I want to reproduce the diseases checkbox (from firestore) in another page. How can I reproduce them from firestore and display them pre-checked / pre-unchecked?

There are a bunch of possibilities. I would recommend emulating the Reactive Forms idioms, and assigning your stored values to the values of various backing controls.