Chief of Naval Operations Admiral Michael Gilday during the daily briefing on the novel coronavirus at the White House in April. Photo: Mandel Ngan/AFP via Getty Images

Adm. Michael Gilday, chief of naval operations, is self-quarantining against the novel coronavirus following contact with a family member who tested positive for the virus, the Pentagon said in a statement to news outlets Sunday.

The big picture: A Navy official told CNN that Gilday had tested negative for COVID-19 and was taking the action as a precautionary measure. Gen. Joseph Lengyel will have a third test Monday after an earlier one indicated he'd tested positive and another showed a negative reading, per Reuters. Sen. Lamar Alexander (R-Tenn.), Anthony Fauci, FDA commissioner Stephen Hahn and CDC director Robert Redfiel have also self-quarantined after contact with people who tested positive.

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Updated Aug 11, 2020 - Health

New Zealand reports first local coronavirus cases for 102 days

Prime Minister Jacinda Ardern after a press conference at Parliament on July 22 in Wellington, New Zealand. Photo: Hagen Hopkins/Getty Images

AUCKLAND, New Zealand — Auckland is locking down and the rest of New Zealand faces lesser restrictions for 72 hours after a four members of the same family tested positive for COVID-19, Prime Minister Jacinda Ardern announced Tuesday.

Why it matters: It's the first cases not in managed isolation for 102 days, Ardern said at a news briefing.

Updated 7 hours ago - Health

World coronavirus updates

Data: The Center for Systems Science and Engineering at Johns Hopkins; Map: Axios Visuals

The United Kingdom slumped into recession on Wednesday, as its gross domestic product GDP shrank 20.4% compared with the first three months of the year.

By the numbers: Over 741,400 people have died of the novel coronavirus globally and more than 20.2 million have tested positive, per Johns Hopkins. Almost 12.6 million have recovered from the virus.

15 hours ago - Health

Fauci says he "seriously" doubts Russia's coronavirus vaccine is safe

NIAID director Anthony Fauci testifies during a July congressional hearing on Capitol Hill. Photo: Kevin DietschI/AFP via Getty Images

NIAID director Anthony Fauci cast doubt during a National Geographic discussion due to air this week on the effectiveness of Russia's registered coronavirus vaccine touted by President Vladimir Putin on Tuesday.

Why it matters: "Having a vaccine ... and proving that a vaccine is safe and effective are two different things," Fauci told told ABC News' Deborah Roberts in the discussion, expected to air on Thursday. His comments add to the weight of skepticism from scientists around the world on the Russia vaccine. There is no published scientific to support support Putin's claims.