Christine Hahn MD

Lyme Disease: Role of Blood Tests

If you were exposed to ticks and you get an expanding, circular rash (erythema migrans), your doctor may treat you for Lyme disease without doing a blood test. Blood tests done in the first few weeks may not show Lyme disease even when you have the illness. This is because the body’s immune system responds slowly to the…

Western Black-Legged Tick

Source: Public Health Image Library (PHIL). James Gathany; William Nicholshon. Available online: Western black-legged ticks are one of two types of ticks in the United States that carry Lyme disease bacteria.

Influenza (Seasonal Flu)

Discusses symptoms of the flu, which is caused by the influenza virus. Covers how it’s spread and when people who have the flu are contagious. Discusses prevention, including getting the influenza vaccine. Offers home treatment tips.

Chickenpox and Smallpox Rash Comparison

Source: The U.S. Centers for Disease Control and Prevention (CDC). Differences between chickenpox and smallpox Chickenpox Smallpox How initial symptoms differ 0 to 2 days of mild illness pass before the rash develops. 2 to 3 days of severe illness pass before the rash develops. Lesions first appear on the face or trunk…

Flu: Should I Take Antiviral Medicine?

Guides through decision to take antiviral medicine for the flu. Explains the two types of antiviral medicines for the flu and who should take them. Covers benefits and risks. Includes an interactive tool to help you make your decision.