How does a catalyst work?

Catalysts function by supplying a (different) system with a lower activation energy and a different transition state. As a result, there are more molecular collisions that have the energy to enter the transition state. As a result, catalysts may facilitate reactions that would otherwise be slowed or stopped by a kinetic barrier.

Explanation:

I’m guessing in “your own words” so here goes nothing: Catalysts work by giving an (elective) system including an alternate progress state and lower initiation energy.

Explanation:

clinically, some people often have repeated allergies, eczema and respiratory infections or other parts of the infection, in this case, in addition to some routine tests such as tests for white blood cells, immunoglobulin series, lymphocyte subsets, etc., the five immune immunoglobulin tests are also necessary.

it would lead to upper respiratory infections and pneumonia.