For three years, 67-year-old Mr. Hung suffered from nightly itching, believing it to be an allergy. A recent microscopic examination revealed the true culprit: scabies.

Every time I'm bitten by an ant or mosquito, my skin becomes red and swollen. Can I still get vaccinated for measles, chickenpox, and dengue fever? (Le Lien, 32, Dong Nai)