Health-care companies were more or less flat as investors hedged their bets on the outlook for growth in the sector.

Thermo Fisher Scientific is nearing a deal to buy pharmaceutical-testing company PPD for more than $15 billion, The Wall Street Journal reported.

Blood-clot issues surrounding Johnson & Johnson's Covid-19 vaccine could complicate the U.S. mass vaccination campaign, deterring people who are already hesitant and giving room for misinformation to spread, health experts said.

Meanwhile, the European Union, grappling with the potential loss of Johnson & Johnson Covid-19 vaccines and working through issues with AstraZeneca shots, will buy an additional 50 million doses from BioNTech and Pfizer for the quarter, and is in talks to purchase up to 1.8 billion more doses over the next two years.

Write to Rob Curran at rob.curran@dowjones.com

(END) Dow Jones Newswires

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