United Kingdom

Julie Steenhuysen

Jeff Mason is a White House Correspondent for Reuters and the 2016-2017 president of the White House Correspondents’ Association. He was the lead Reuters correspondent for President Barack Obama's 2012 campaign and interviewed the president at the White House in 2015. Jeff has been based in Washington since 2008, when he covered the historic race between Obama, Hillary Clinton and John McCain. Jeff started his career in Frankfurt, Germany, where he covered the airline industry before moving to Brussels, Belgium, where he covered the European Union. He is a Colorado native, proud graduate of Northwestern University and former Fulbright scholar.

Twitter handle: @jeffmason1

19 Apr 2018

WHO recommends testing before use of Sanofi's dengue vaccine

PARIS/CHICAGO The World Health Organization (WHO) said on Thursday Sanofi's vaccine against dengue should only be used after testing on individuals to assess whether they have ever been exposed to the infection.

16 Apr 2018

Survival data boosts Merck's Keytruda lead in lung cancer

NEW YORK/CHICAGO Merck & Co's immunotherapy Keytruda plus chemotherapy significantly improved overall survival in newly-diagnosed patients with advanced non-small cell lung cancer in a closely-watched study, cementing its lead position over Bristol-Myers Squibb Co and others in the most lucrative oncology market.

10 Apr 2018

Researchers propose new Alzheimer's definition based on biology

Alzheimer's researchers have proposed a radical change in the way the disease is defined, focusing on biological changes in the body rather than clinical symptoms such as memory loss and cognitive decline.

21 Mar 2018

Longtime U.S. AIDS researcher picked to run CDC

CHICAGO Longtime AIDS researcher Dr. Robert Redfield will be the new director of the Centers for Disease Control and Prevention in Atlanta, the administration of U.S. President Donald Trump announced on Wednesday.

02 Feb 2018

High levels of cellphone radiation linked to tumors in male rats: U.S. study

Male rats exposed to very high levels of the kind of radiation emitted by cellphones developed tumors in the tissues around their hearts, according to a draft report by U.S. government researchers on the potential health risks of the devices.

01 Feb 2018

U.S. public health chief quits over financial conflicts

The head of the leading U.S. public health agency has resigned because of financial conflicts of interest that documents showed included purchases of tobacco and healthcare stocks while in office. | Video

29 Jan 2018

How Sanofi's setback could lead to better dengue vaccines

CHICAGO New dengue vaccines being developed by Takeda Pharmaceuticals Co Ltd and U.S. government scientists are poised to provide a safer alternative to Sanofi's Dengvaxia, according to vaccine experts, because they already take into account some of the issues that sidelined the product last year.

26 Jan 2018

Flu still widespread in U.S., worst season since 2014/2015: CDC

CHICAGO Flu continues to be widespread across the United States and the season is on track to be one of the most severe since 2014/2015, when 34 million people were sickened by the virus and 710,000 were hospitalized, U.S. health officials said on Friday.

25 Jan 2018

More birth defects in U.S. areas with Zika: U.S. health officials

CHICAGO The mosquito-born Zika virus may be responsible for an increase in birth defects in U.S. states and territories even in women who had no lab evidence of Zika exposure during pregnancy, U.S. health officials said on Thursday.

25 Jan 2018

Baxter to import IV saline bags from Mexico to ease U.S. shortage

(This version of the Jan. 24 story corrects the number of Baxter plants in Puerto Rico making small IV bags to two from three in paragraph five)

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