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			 Yet today two-thirds of analysts tracked by Thomson Reuters 
			recommend the stock, making it one of the sector's biggest consensus 
			buys, and CEO Pascal Soriot says he is "absolutely" happy to carry 
			on into the 2020s as he chases early use of modern cancer drugs. 
 "I don't have any plans to retire anytime soon," he told Reuters.
 
 Soriot and his team are increasingly confident that while 
			AstraZeneca may have lost one part of the battle for cancer market 
			dominance, it can still win elsewhere by targeting tumors before 
			they have spread around the body.
 
 That is the second element of a twin-track strategy to differentiate 
			AstraZeneca in the hot area of immune system-boosting drugs, which 
			has seen rivals - led by Merck & Co <MRK.N> - leap ahead in 
			late-stage or metastatic disease.
 
 The idea that immunotherapy may actually work best in less sick 
			patients is logical, since the immune system's natural role is to 
			destroy nascent tumors. Indeed, some cancer doctors believe this 
			could become the main battleground in future.
 
 "It's not yet prime time ... but in the long run I think we will 
			move immunotherapy to a more front-line early disease situation and 
			I hope we will be treating more patients in that setting than in 
			late-stage disease," said John Haanen, an oncologist at the 
			Netherlands Cancer Institute.
 
 JUMP-START
 
 AstraZeneca already has a jump-start here, since its Imfinzi 
			immunotherapy is the new standard of care in treating early 
			inoperable stage III lung cancer. That win follows a decision to run 
			a study in this setting ahead of competitors.
 
 "It was a smart move by AstraZeneca and they are now absolutely in 
			business," said Haanen.
 
 Imfinzi sales will be a major focus for investors when the company 
			reports half-year results on July 26.
 
			
			 
			
			 
			Competitor Merck last month presented similar stage III results from 
			a small study, but a larger trial using Bristol-Myers Squibb's <BMY.N> 
			Opdivo drug recently stopped recruiting patients, suggesting direct 
			competition is not imminent.
 AstraZeneca hopes to build on this lead in the so-called adjuvant 
			setting, where drugs are given after surgery to keep the cancer from 
			coming back.
 
 Its BR.31 immunotherapy trial with Imfinzi was the first to start 
			adjuvant therapy for lung cancer and the company thinks it could be 
			the first to complete a major trial, with disease-free survival data 
			due in 2020.
 
			
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			"We are certainly hopeful to be the first," said David Berman, the 
			group's head of immuno-oncology.
 Berman jumped ship from Bristol-Myers three years ago and believes 
			his new employer has hit on a winning strategy. "By moving to early 
			stage you can actually leapfrog competitors who are ahead of you in 
			stage IV," he said.
 
 Still, the race is on in both the adjuvant and neoadjuvant setting, 
			where treatment precedes surgery. With each trial taking several 
			years, picking winners is not easy.
 
 "If everyone is similar on timing, then it is going to come down to 
			data," said Liberum analyst Roger Franklin, who rates AstraZeneca a 
			hold.
 
			
			 
			HOW LONG TO TREAT?
 Lung cancer is by far the biggest killer among cancers and the top 
			commercial opportunity for so-called PDx immunotherapy infusions 
			expected to be worth $15 billion in sales this year, according to 
			Thomson Reuters' consensus forecasts.
 
 AstraZeneca estimates the majority of lung cancer patients are being 
			diagnosed relatively early in the disease, when there is a better 
			chance of a cure.
 
			One issue that concerns doctors is how long patients treated 
			post-surgery should take immunotherapy drugs, especially given that 
			they cost nearly $150,000 a year.
 Most of the adjuvant trials now under way against various cancers 
			are designed to give drugs for one year. Haanen is skeptical: "Do 
			you really need a year's treatment? Probably not."
 
 AstraZeneca is also pushing its early treatment mantra beyond 
			immunotherapy with its lung cancer pill Tagrisso, which works is 
			targeted at patients with specific genetic mutations that are 
			particularly common in the booming Chinese market.
 
 With a clear lead in this particular treatment area, AstraZeneca has 
			time to build out its Tagrisso business in early disease through two 
			big ongoing clinical trials.
 
 Dan Mahony, a healthcare fund manager at Polar Capital, is bullish 
			on AstraZeneca's prospects but reluctant to predict how the fight 
			will play out in the long term.
 
 Still, he says: "There's more going on at AstraZeneca than met the 
			eye a year ago."
 
 (Editing by Sonya Hepinstall)
 
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