Ensure that the field "Date of next VL test" does not allow a date before the date supplied in the field "Date of last VL test".

[tobiasmakai]

This also applies for the fields "Date of last viral load test" and "Date of next VL test" on the Household Screening form.

[Kutembachinambu]

The "Date of next VL" field is still allowing older to be saved under "Date of next VL"