Human bodies are designed for regular physical activity. The sedentary nature of much of modern life probably plays a significant role in the epidemic incidence of depression today. Many studies show that depressed patients who stick to a regimen of aerobic exercise improve as much as those treated with medication.
Now a cholera epidemic was sweeping through Southeast Asia and south Asia in the early 1970s, so I started medical school and I joined a laboratory to work on this.
Ever since Woodward and Bernstein, there's sort of been an epidemic of confidential sources in Washington, in particular where people will actually - when you call them up on the phone, they'll say, 'This is off the record,' or, 'This is on background,' or they don't even wait for you to say anything.
I couldn't open up a magazine, you couldn't read a newspaper, you couldn't turn on the TV without hearing about the obesity epidemic in America.
China is certainly an important player in the global economy, and a widespread AIDS epidemic would threaten that growth.
I have covered wars, before the epidemic began and since. They are all ugly and painful and unjust, but for me, nothing has matched the dread I felt while walking through the Castro, the Village, or Dupont Circle at the height of the AIDS epidemic.
When the AIDS epidemic broke, because I happened to be a science nerd and knew a lot about viruses and a lot about that virus at the time, I felt a moral obligation to go out and try to stem the fear and get out and explain to people what the disease was and how it worked.
Online harassment, especially gendered online harassment, is an epidemic. Women are being driven out; they're being driven offline. This isn't just in gaming. This is happening across the board online, especially with women who participate in or work in male-dominated industries.
Lesbian, gay, bisexual, and transgender teens are bullied and ostracized in epidemic proportions. It's disgusting, and it must change.
Although it is still important to develop an HIV vaccine, we have significant tools already at our disposal that can make a major impact on the trajectory of this epidemic.