Colds and Flu

There are not 200+ types of influenza viruses - influenza viruses are categorized into types A, B, C, and D, with various subtypes and strains, but not 200 distinct types. The claim is false.

Antibiotics only work against bacterial infections, not viral infections like the flu or common cold. These illnesses must run their course or be treated with antiviral medications.

The term 'stomach flu' is a misnomer - it actually refers to viral gastroenteritis, not influenza. Influenza B is a respiratory virus, not a gastrointestinal one.

Colds and flu are caused by viruses, not by cold weather itself. While cold weather may contribute to spread by keeping people indoors in closer contact, the temperature does not cause these illnesses.

According to CDC data, approximately 5-20% of the U.S. population gets the flu each year. Among the given options, 20% represents the upper end of this estimate and is the most accurate choice provided.

Cold sores (fever blisters) are caused by herpes simplex virus type 1 (HSV-1), not by the viruses that cause the common cold (such as rhinoviruses, coronaviruses, etc.). These are completely different viral families.

Rhinoviruses are the most common cause of the common cold, responsible for approximately 30-50% of all cold cases. The name comes from 'rhino' meaning nose, where these viruses primarily replicate.

Medications used to treat viral infections like influenza are called antiviral medications. These drugs work by inhibiting virus replication. Options A and C are not standard medical terms.

A low-grade fever is typically defined as a temperature above normal (98.6°F or 37°C) but below 100.4°F (38°C). Fevers of 100.4°F and above are considered significant fevers.

While hand hygiene is important, the BEST way to prevent flu infection is annual vaccination. Hand washing helps reduce spread but vaccination is the primary prevention method recommended by health authorities.

There is no cure for the common cold - no medication that ends it. Treatment is limited to symptom relief while the immune system fights the viral infection, which typically resolves on its own in 7-10 days.

Respiratory droplets from coughing and sneezing typically travel about 3 feet through the air before settling. This is the basis for social distancing recommendations to prevent droplet transmission.