Introduction: Giardiasis, caused by the protozoan parasite Giardia lamblia, is a common waterborne illness affecting millions worldwide. Preventing Giardia infection involves adopting safe water practices to minimize the risk of contamination. In this comprehensive guide, we discuss Giardia infection and provide practical tips for ensuring safe drinking water.   Giardia Infection: Giardia infection, also known as giardiasis, is a common intestinal illness caused by the protozoan parasite Giardia lamblia. It spreads through the ingestion of contaminated food or water containing Giardia cysts. Once ingested, the cysts transform into active parasites in the intestines, leading to symptoms such as diarrhea, abdominal…