/*
  * Handles when a single disease it tapped, sending a user to the single disease page
  * of that given disease.
  */
 async void Handle_ItemTapped(object sender, ItemTappedEventArgs e)
 {
     if (e == null)
     {
         return; //ItemSelected is called on deselection, which results in SelectedItem being set to null
     }
     var singleDiseasePage = new SingleDiseasePage(this, (Disease)DiseasesList.SelectedItem);
     await Navigation.PushAsync(singleDiseasePage);
 }
 /// <summary>
 /// Opens a single disease adding page when the Add Disease button is pressed
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private async void AddDisease_OnClicked(object sender, EventArgs e)
 {
     Console.WriteLine("Opening single procedure...");
     var singleDiseasePage = new SingleDiseasePage(this);
     await Navigation.PushAsync(singleDiseasePage);
 }