Aerobic exercise
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COVID-19 variants: What's the concern?
The virus that causes COVID-19 has changed over time, which has affected prevention, diagnosis and treatment of COVID-19.
COVID-19 vs. flu: Similarities and differences
Find out the similarities and differences between coronavirus disease 2019 (COVID-19) and the flu (influenza) and learn about ways to prevent getting these diseases.
COVID-19, cold, allergies and the flu: What are the differences?
Knowing if you have COVID-19, a cold, the flu or seasonal allergies isn't easy. Find out about the differences between these illnesses.
COVID-19: Long-term effects
Learn about the possible long-term effects of COVID-19.
CT scan
This imaging test helps detect internal injuries and disease by providing cross-sectional images of bones, blood vessels and soft tissues inside the body.
Caffeine: How does it affect blood pressure?
Caffeinated drinks can raise blood pressure in the short term. But the long-term effects on blood pressure aren't clear.
Can vitamin D protect against coronavirus disease 2019 (COVID-19)?
Find out what the research says about links between this key vitamin and the widespread viral infection.
Cancer
Find out the basics about cancer, including symptoms, causes and treatments. Learn steps you can take to prevent cancer.
Cancer causes: Popular myths about the causes of cancer
Get the facts and find out why these popular myths about cancer causes are wrong.
Car sickness in children: Can I prevent it?
Carefully planned pre-trip meals, air ventilation and distractions might help prevent car sickness in children.
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