Inclusion Criteria:  Consent provided Married female aged 17-24 years In good general health, with no comorbidities Absence of COVID19 symptoms Intend to comply with study procedures and follow up  Exclusion Criteria:  Women who do not meet the enrollment age criteria Women participating in interventional clinical trials Women who intend to leave the study area Women who cannot comply with study procedure's and follow-up Illness and other co-morbidities Signs of potential COVID19 infection BMI higher than 24.9 kg/m2 Women who already have a member of their household participating Women who have taken antibiotics within the past 3 months Women who are past 16 weeks post- conception