add condition for infant testing: mother must be known HIV+ (confirmed with Joe)

linked to PR #732

Author: tdm32

src/scripts/hiv/projections_jan2023/analysis_full_model.py

@@ -23,7 +23,7 @@
 
 # %% Run the simulation
 start_date = Date(2010, 1, 1)
-end_date = Date(2021, 1, 1)
+end_date = Date(2012, 1, 1)
 popsize = 10000
 # todo check if deviance_measure needed in fullmodel.py
 scenario = 0

src/tlo/methods/newborn_outcomes.py

@@ -948,9 +948,11 @@ def hiv_screening_for_at_risk_newborns(self, child_id):
         """
         df = self.sim.population.props
         child_id = int(child_id)
+        mother_id = df.at[child_id, 'mother_id']
 
         if 'Hiv' in self.sim.modules:
-            if not df.at[child_id, 'hv_diagnosed'] and (
+            # schedule test if child not already diagnosed and mother is known hiv+
+            if not df.at[child_id, 'hv_diagnosed'] and df.at[mother_id, 'hv_diagnosed'] and (
                     self.rng.random_sample() < self.sim.modules['Hiv'].parameters['prob_hiv_test_for_newborn_infant']):
 
                 if df.at[child_id, 'nb_pnc_check'] == 1: