The condition known as long covid continues to frustrate its sufferers, baffle scientists and alarm people who are concerned about being infected by the coronavirus. Symptoms range from mild to debilitating and can last for weeks, months or longer. Wellness reporter Allyson Chiu spoke with experts who are researching and treating long covid to compile answers to some of the most commonly asked questions about the condition. Please keep in mind that, because covid and its potential long-term effe