A possible answer could be the quality of air being inhaled
The brain stem which is composed of the Pons, The Medulla, and the Midbrain serve a very vital function... They control the functions that keep you alive; Heart Rate, Respiratory Rate, Breathing input and output, Blood pressure, as well a vasomotor functions. So taking this into account, an injury to the brain stem is extremely bad, as that can and will most definitely be very lethal.
I think you are talking about the 2 types of virus cycles
the lytic cycle is where a virus invades a bacteria host and quickly inserts its own dna proteins into the bacteria's. the bacteria is then forced to copy the virus dna and reproduce the virus. once all the coppies are made the virus triggers the bacteria to self destruct from the inside, causing the bacteria toburst and releases hundreds of the tiny viruses into the host.
(think of when you get a cold)
the other cycle is the lysogenic cycle these are viruses that enter a host and lay quietly dormant while inserting their own proteins into the dna sequence of the bacteria host. the bacteria unknowingly copies the virus dna along with its own. the host doesn't know the virus has been in them until a stressor such as getting a high temperature of an infection causes the viruses to activate and stop being dormant (like with HIV)<span />
You don't really see what type of dangerous situation but since you asked a dangerous situation you could do is a stunt motorcycle guy that rides his motorcycle over a pool of sharks. Or a man who wears red in a Bulls arena to get the balls attention but he risk dying if he gets punctured by one of the bulls horns. Or another dangerous situation could be someone entering a monster cave. Or another dangerous situation could be someone meeting up with a Stranger online. There's just so many situations
Physical activity has multiple benefits! Physical activity can lower your changes of getting certain conditions such as type 2 diabetes, heart disease, dementia, and much more. Physical activity can also be a stress reducer!
