Vaccine needed if you already had COVID-19, photodynamic therapy for lung cancer central sleep apnea, super lice and more

Find out why you should get a vaccine if you've already had COVID-19. You still have a risk of COVID-19 reinfection and complications.

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Should I get a COVID-19 vaccine if I've already had COVID-19? Find out why you should get a vaccine if you've already had COVID-19. You still have a risk of COVID-19 reinfection and complications. Read more ›

COVID-19 resources and guidance from Mayo Clinic

Perimenopause: What are the symptoms? Discover effective treatments and learn self-care strategies for hot flashes, night sweats, vaginal dryness and other perimenopause symptoms. Read more › Advertisement Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission. Advertising & Sponsorship Policy | Opportunities | Ad Choices Photodynamic therapy: An effective treatment for lung cancer? Photodynamic therapy may play a limited role in lung cancer treatment. Read more › Central sleep apnea Find out how a mix-up in brain signals can affect your breathing during sleep and learn how this breathing disorder can be treated. Read more ›

ADDITIONAL HIGHLIGHTS Super lice: Should I be worried about these treatment-resistant pests? Coconut water: Is it super hydrating? Pet allergy: Signs and symptoms

Guide to Your Baby's First Years An easy-to-use and comprehensive how-to manual for caring for your child, newborn to three. Learn more

HEALTHY TIPS & RECIPES Mayo Clinic Health Letter Monthly health insights, delivered straight to your inbox. Subscribe now Mayo Clinic Health Letter Monthly health insights, delivered straight to your inbox. Subscribe now Keep your breakfast cereal healthy Dry cereal can be a good option for breakfast, at home or on the go. If you make healthy choices, that is. Learn more Keep your breakfast cereal healthy Dry cereal can be a good option for breakfast, at home or on the go. If you make healthy choices, that is. Learn more Trusted health tools Use these simple calculators and self-assessments for personalized health tips. BMI Calculator | Calorie Calculator Trusted health tools Use these simple calculators and self-assessments for personalized health tips. BMI Calculator | Calorie Calculator Symptom checker Use our Symptom Checker to explore possible causes of your symptoms based upon Mayo Clinic's patient care experience. Check symptoms Symptom checker Use our Symptom Checker to explore possible causes of your symptoms based upon Mayo Clinic's patient care experience. Check symptoms Shrimp scampi Olive oil replaces half the butter in this healthier version of the shrimp recipe. See recipe Rhubarb pecan muffins These muffins are tart, sweet and nutty! Delicious at breakfast or as a dessert. See recipe

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