inactivate critical enzymes
Very often fatal.
Yes, malaria is very often fatal if not treated.
Deserts have very low humidity and very high temperatures, very low temperatures, or can alternate between the two. Heat and low humidity can cause fatal dehydration in a matter of hours. Low temperatures can cause hypothermia. Some deserts are prone to dust storms.
Superconductor
I think it is, because this type of cancer is very aggressive one.
It can be used with any temperature. However the Kelvin scale (centigrade based on absolute zero) is often used for very cold temperatures, or for very hot temperatures, where it is practically the same as Celsius.
Nerve damage is very bad, and often fatal. It is the leading cause of heart disease & stroke.
A fatal flaw is a personality trait or characteristic in a person that ultimately leads to their downfall or failure. It is often a deep-seated flaw that contributes significantly to their negative outcomes or tragic fate. In literature and storytelling, fatal flaws are commonly used to create complex characters and drive the plot forward.
Alaska is known for being very cold, with temperatures during the winter often dropping well below freezing.
it is very fatal, if not treated quickly you may die within a week
It is important to have accurate communication in aviation because when accidents happen, they are usually very fatal.
Many lung and respiratory diseases are life threatening: tumors found in lung tissue (as well as anywhere else) may be malignant and prove to be fatal; pneumonia, a lung infection is often fatal in the young and the elderly; obstructive lung diseases such as asthma can also be fatal; lung diseases onset from smoking are often fatal as well.