For Index Cases (treated patients from the ANTICOV Study) 1. Comes from household in accessible area 2. At least 1 Household Contact (HHC) currently residing at household with index 3. Contact details of HHC provided by index case 4. Majority (over 50%) of HHC provide consent and enrol in the ANTICOV-EPI study 5. Randomised to ANTICOV For Household contacts (not treated patients living with the Index patient) 6. Member of same household as index case (household defined as sharing same cooking area) during the conduct of the study 7. Resides in household with index case before index case illness onset. 8. Majority (over 50%) of HHC provide consent and enrol in the ANTICOV-EPI study

For Index Cases (treated patients from the ANTICOV Study) 1. Comes from household in accessible area 2. At least 1 Household Contact (HHC) currently residing at household with index 3. Contact details of HHC provided by index case 4. Majority (over 50%) of HHC provide consent and enrol in the ANTICOV-EPI study 5. Randomised to ANTICOV For Household contacts (not treated patients living with the Index patient) 6. Member of same household as index case (household defined as sharing same cooking area) during the conduct of the study 7. Resides in household with index case before index case illness onset. 8. Majority (over 50%) of HHC provide consent and enrol in the ANTICOV-EPI study