Tom Mahin

drinking water bacteria sanitation water chlorine cryptosporidium health oxfam hiv africa aids nepal diarrhea earthquake hygiene wash pathogens filters coliform fecal wells outbreak cholera water treatment stormwater viruses water sources haiti chlorination biosand filters cawst household water thermotolerant drinking delaqua zimbabwe membrane filtration disaster emergency humanitarian latrines aid bateria kathmandu household wtaer treatment coliphage beaches water pollution e. coli flooding hurricane gates foundation unicef springs infectious microbiology sewers rotavirus weight wasting anemia stunting rainwater giardia cancer groundwater environment wastewater vitamin development nutrition handwashing malnutrition deficiency infant mortality maternal mortality innovations community water supply mit csos hepatitis iron bangladesh arsenic asia phosphates tubewells emergencies