In Texas, Parents Fighting Vaccinations Say Their Movement Is Winning

Public health advocates hoped that the measles outbreak might persuade the reluctant to get shots. That has not turned out to be true.

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Scientists Begin Testing Bird Flu Vaccine in Seals

If the results are promising, veterinarians hope to give the shots to wild Hawaiian monk seals, which are endangered.

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What to Know About Jim O’Neill, the New Acting C.D.C. Director

The selection of Jim O’Neill, a former Silicon Valley executive, drew objections from Democrats, who noted his lack of medical or scientific training.

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Why Young Children May Not Get Covid Shots This Fall

Under Robert F. Kennedy Jr., federal officials may withdraw an endorsement for the vaccine in younger children.

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Measles Spreads Quickly in Rural Alberta Areas That Resisted Vaccines

The virus is spreading in insular Mennonite communities. But the broader population is vulnerable as vaccine rates have fallen across the Canadian province since the Covid-19 pandemic.

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China’s Fight Against Chikungunya Virus Tests a City’s Post-Covid Patience

The authorities are inspecting homes, tracking purchases of fever medicines and deploying drones as they urge people to join an eradication campaign that echoes Covid measures.

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U.S. Quietly Drafts Plan to End Program That Saved Millions From AIDS

PEPFAR, the campaign to end H.I.V. globally, would morph into an effort to detect disease outbreaks and sell American products, according to documents obtained by The Times.

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South African AIDS Activist Pushes for H.I.V. Treatment Access After U.S.-Aid Cuts

Zackie Achmat, once at the center of South Africa’s push for lifesaving H.I.V. treatment, has come out of retirement as U.S. funding cuts and his own government’s inertia revive old fears.

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Promise of Victory Over H.I.V. Fades as U.S. Withdraws Support

A new drug that gives almost complete protection against the virus was to be administered across Africa this year. Now, much of the funding for that effort is gone.

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Regulators Approve Lenacapavir for H.I.V. Prevention

The drug could change the course of the AIDS epidemic. But the Trump administration has gutted the programs that might have paid for it in low-income countries.

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