Once upon a time, I thought I was strong. I thought I could drink unfiltered water and be fine. Please remember, that I did live in Kenya. Where everybody told me that it is dangerous to drink water straight from the tap. But what did I care? what was there to fear? I had been drinking tap water for the last two decades or so! Then it happened.  It started with fever, then my joints were weak, then I could not get out of bed, yes, I was dying!  The end was near.  Just because I decided to drink unfiltered water!  I did recover after swallowing the biggest capsules I had ever seen.  And I bought a filter!