The 66-year-old wrote in a tweet Tuesday that he is experiencing mild symptoms and is "following the experts' advice" by isolating himself until he's healthy.
A spokesperson for Gates maintained that his decades-old "affair," which was the subject of the recent investigation, had no connection to his decision to step down.
"My dad's wisdom, generosity, empathy, and humility had a huge influence on people around the world," Gates wrote in a tribute to his father.
Microsoft co-founder Bill Gates gives high marks for social distancing efforts but low marks for testing. He says he thinks large public gatherings may have to wait until there's a vaccine.
The billionaire philanthropist says the country needs a simpler system to help the poor navigate housing, health care and job opportunities.
The Gates Foundation has released projections showing the impact on new cases of HIV and issues like child mortality if there's a global drop in foreign aid.
The two titans aired their views on what's become a public debate over whether Apple should be compelled to unlock an iPhone used by San Bernardino shooter Syed Rizwan Farook.
Twenty countries and 28 investors promised on Monday to jointly fund the development of energy alternatives. Backers of the initiative say private money is key to the next big push in energy.
In a strongly worded essay in The New England Journal of Medicine, the philanthropist calls for a global system to respond to future medical emergencies. We ask experienced Ebola hands to weigh in.