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Description
Common ColdFACTS: There are over 250 different kinds of cold viruses! But rhinovirus is by far the most common. (Rhino means "nose" in Greek think rhinoceros.) With over 100 different varieties, rhinoviruses are responsible for almost 35 percent of colds. Rhinovirus is particularly active during the fall and winter months. Why? Because rhinovirus loves the low humidity. Also, when the humidity is low, your nose dries out and is more susceptible to infection.
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Best in 7 days
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Best in 7 days
4.4 ★★★★★
Based on 1136 reviews
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Product Reviews
★★★★★ 2
Incomplete
Format: Paperback
Only received three of the four volumes. Did not receive the core 1 study guide.
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Reviewed in the United States on October 8, 2025
★★★★★ 5
Very detailed
Format: Paperback
Great info. Definitely a great purchase
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Reviewed in the United States on February 8, 2026
★★★★★ 5
These are the actual reference books.
Format: Paperback
The actual books for the actual tests. You Need these if you want to study and pass the Comptia A+ exams. Legit the real deal.
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Reviewed in the United States on March 2, 2026
★★★★★ 5
Amazing, never have to but the disposables again
Color: Matte Gold
Great quality, heavy, and works great. Lots of replacement blades too!
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Nice feel
Color: Matte Silver
Feels good in the hand. It has some weight to it. I like the fact you can change out the blades. Way better than the cheap plastic disposable razors.
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Reviewed in the United States on April 13, 2026
