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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Many Older People Embrace Vaccines. Research Is Proving Them Right.

Newer formulations are even more effective at preventing illnesses that commonly afflict seniors — perhaps even dementia.

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Mpox Surges in Sierra Leone

West African nations are struggling to track and treat infections, and experts warn the outbreak is rapidly spreading, while the United States is cutting global vaccination efforts.

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Palantir’s Collection of Disease Data at C.D.C. Stirs Privacy Concerns

U.S. and state officials say the consolidation of the public health agency’s vast trove of information could expose patients and will delay analysis of long-term trends.

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