Examlex
A molecule or ion that provides an electron pair for coordinate covalent bond formation is called a Lewis ________.
Influenza
A highly contagious viral infection that attacks the respiratory system, commonly known as the flu.
Allergy
An immune system reaction to a foreign substance, such as pollen, food, or pet dander, that doesn't cause a response in most people.
Moderate Cough
A cough that is not severe but persists, possibly indicating a mild or developing health issue.
Common Cold
A viral infection of the upper respiratory system, characterized by congestion, runny nose, and sneezing.
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