When people exhale they are not giving out oxygen but are putting out extra carbon dioxide which is poisonous to humans (that's why we blow it out). But the amount of oxygen we remove from the air we inhale, and the amount of carbon dioxide we add to our exhaled air, is not nearly enough to be immediately dangerous to someone else. This is why you can revive a person by carefully breathing into their mouth while pinching their nose, as in rescue breathing.
The only way exhaled air becomes hazardous to yourself or others is if you are exhaling for an extended time in a small, air tight space. Then you use up enough of the oxygen, and add enough carbon dioxide, to create a dangerously low oxygen concentration, or a dangerously high carbon dioxide concentration.
No one can predict someone elses death, so that is unknown.
Inhaling helium from balloons can be dangerous as it can displace oxygen in your lungs, leading to oxygen deprivation which can be harmful or even life-threatening. It can also cause dizziness, lightheadedness, and in extreme cases, unconsciousness or asphyxiation. It is not recommended to inhale helium from balloons.
Vampires do die, but not completely. They die then come back in someone elses body, the are called a host when they are body-less. So no, they don't die.
Only if you inhale too much. Your lungs can't function without oxygen, and helium is devoid of it. Inhaling a little has no long term adverse effects so long as you blow it out.
Yes. If you inhale enough of it to displace the oxygen content in your blood you can die from inhaling poisionous gasses.
Yes, inhaling too much oxygen can lead to oxygen toxicity, which can cause lung damage and respiratory distress. In severe cases, it can be fatal. It is important to follow medical guidelines for oxygen therapy to prevent this risk.
Poor circulation to the brain can cause tissues to die from lack of oxygen. Another cause of tissue damage in the brain can be a blow to your head or inhaling smoke from a fire more than oxygen (which can also cause suffocation).
they die because it is too cold,-150C, and there is no oxygen.
12 a year
Yes you can, don't inhale it!
None. Tobacco Control would deceive that people do but it is pure scaremongering propaganda based on junk science.
about 30% of all users die.