The waterborne disease that is caused by the protozoan present in both humans and wild animals' intestinal tract, that also occurs to the campers who are staying in the wilderness areas and were able to swallow pathogenic cysts when they are able to drink the water that is not even unfiltered, the water they usually drink are from the mountain and stream and the one responsible for it is the giardiasis.
ventilation mask (with oxygen inlet) is <span>The preferred oxygen delivery device to use when providing emergency oxygen to a non-breathing person.
A ventilation mask with an oxygen inlet is consist of a pump that allow another person to pump the air into the non-breathing person's lung.
Other form of oxygen delivery device require the user to directly breath in to the device, which will be impossible of that person is non-breathing condition.</span>
1 IS A
2 IS D
3 IS A
I DON'T KNOW WHAT 4 IS BUT I HOPE I HELP
