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🌡️ Cold (temperature)
- Cold is the absence of heat.
- When it’s cold, molecules move more slowly.
- Your body reacts by shivering to make heat and narrowing blood vessels to keep warmth in.
🤧 Common cold (illness)
- A mild viral infection (usually rhinovirus).
- Symptoms: runny or stuffy nose, sneezing, sore throat, cough.
- It’s not caused by cold weather, but cold weather can help viruses spread.
- Rest, fluids, and time are the main treatments.
❄️ Cold weather effects
- Can dry your skin and lips.
- Can weaken your immune response slightly.
- Extreme cold can cause hypothermia or frostbite.