public void ShouldSaveNewVaccination()
        {
            //Arrange
            var sut = BuildSUT();

            var vaccinationViewModelMock = new VaccinationViewModelMock();

            vaccinationViewModelMock.SetupSave();

            sut.Vaccinations.Add(vaccinationViewModelMock.Object);

            //Act
            sut.SaveCommand.Execute(vaccinationViewModelMock.Object.Id);

            //Assert
            vaccinationViewModelMock.Verify(x => x.Save(), Times.Once);
        }