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Shares of Twilio extended their gains into Friday, reaching a 52-week high, after the company said in a filing that it anticipates better-than-expected third-quarter revenue. 

It was slightly better than Wall Street expectations of 137,000 deliveries.

The president's campaign manager, Bill Stepien, said previously scheduled events involving members of Trump's family "are also being temporarily postponed."

"Herd immunity is not the strategy of the U.S. government with regard to coronavirus," HHS Secretary Alex Azar told lawmakers on Friday.

Stocks shook off much of their losses, even though President Trump's health and weaker economic data create more worries for the market.

"So we should not feel reassured if the president initially seems OK, because there is still a long time for us to wait to see what the trajectory of his disease is," said Dr. Leana Wen, former Baltimore health commissioner.

Secretary of Defense Mark Esper and Chairman of the Joint Chiefs of Staff Gen. Mark Milley have tested negative for coronavirus.

The results came hours after Trump announced he and the first lady tested positive.

"I'm not saying this is much to do about nothing," CNBC's Jim Cramer said Friday. "I am saying that people should have a buy list ready."

Fidelity's move into the world of active nontransparent exchange-traded funds, which disclose their holdings quarterly instead of daily, "probably shouldn’t excite people," says Main Management's Kim Arthur.

Many major health insurance carriers have waived cost-sharing fees for telehealth visits related to Covid-19, but these waivers soon end for some plans.

For Medicare's 62.7 million beneficiaries — the majority of whom are age 65 or older — the cost of Covid-19 treatment would depend partly on the specifics of their coverage.

The news came hours after President Trump disclosed over Twitter that he and first lady Melania Trump had tested positive. 

The unemployment rate was 7.9%, the Labor Department said Friday in the final jobs report before the November election.

GOP donors are panicking about what to do next after coming close to President Trump at a fundraiser in Bedminster, New Jersey.

Former President Woodrow Wilson became ill with the 1918 flu when he was in Paris in April 1919, much like President Donald Trump's Covid-19 diagnosis in 2020.

President Donald Trump's positive Covid-19 test has prompted many to seek clarity on the procedures in place to deal with a variety of scenarios.

The coronavirus pandemic has made it difficult for many Americans to generate income and, as a result, pay their rent. As many as 35 million people in the U.S. may face eviction. Here's what to do if you're at risk of losing your home.

Check out the companies making headlines in midday trading.

Multiple sources told CNBC's David Faber that there was $200 million spent on Thursday morning on call options for Netflix, Amazon, Facebook and Alphabet,