In 2020, the Conference on Retroviruses and Opportunistic Infections (CROI) was the first scientific conference to move from in-person to virtual due to the COVID-19 pandemic. On the fifth anniversary of the virtual conference, and the pandemic, some of those earliest COVID-19 patients have still not recovered.

The availability of effective antiretroviral therapy has lowered the risk, and the severity, of neural sequelae of HIV infection. “Early in the HIV pandemic, approximately 15% of people with HIV had dementia and or encephalitis,” Howard Fox told his audience. “Fortunately, with treatment, the prevalence of these severe disorders has been greatly lowered. But there is persistence of what are called more minor disorders – which are not minor if you have them.”

In 2020, the Conference on Retroviruses and Opportunistic Infections (CROI) was the first scientific conference to move from in-person to virtual due to the COVID-19 pandemic. On the fifth anniversary of the virtual conference, and the pandemic, some of those earliest COVID-19 patients have still not recovered.

In 2020, the Conference on Retroviruses and Opportunistic Infections (CROI) was the first scientific conference to move from in-person to virtual due to the COVID-19 pandemic. On the fifth anniversary of the virtual conference, and the pandemic, some of those earliest COVID-19 patients have still not recovered.

At the 2025 meeting of the Conference on Retroviruses and Opportunistic Infections (CROI) it was the best of times, it was the worst of times. On the first full day of the conference, reports from the first HIV cure trial conducted in Africa, the RIO trial and others showed that perhaps, a broadly useful cure is on the horizon.

At the 2025 meeting of the Conference on Retroviruses and Opportunistic Infections (CROI) it was the best of times, it was the worst of times. On the first full day of the conference, reports from the first HIV cure trial conducted in Africa, the RIO trial and others showed that perhaps, a broadly useful cure is on the horizon.

On March 1, 2025, former NIH director Francis Collins’ announced that he had fully resigned from the NIH, where he continued to lead a laboratory after his resignation as director. Collins gave no reason for his resignation, but it comes just before this week’s confirmation hearings for Jay Bhattacharya, who is U.S. President Donald Trump’s nominee to lead the NIH and who Collins called a “fringe epidemiologist” during the COVID pandemic. It is a bitter irony that when Collins resigned as NIH director in 2021, then-President Joe Biden said that “countless researchers will aspire to follow in his footsteps.”

On March 1, 2025, former NIH director Francis Collins’ announced that he had fully resigned from the NIH, where he continued to lead a laboratory after his resignation as director. Collins gave no reason for his resignation, but it comes just before this week’s confirmation hearings for Jay Bhattacharya, who is U.S. President Donald Trump’s nominee to lead the NIH and who Collins called a “fringe epidemiologist” during the COVID pandemic. It is a bitter irony that when Collins resigned as NIH director in 2021, then-President Joe Biden said that “countless researchers will aspire to follow in his footsteps.”

Too much of a good thing, it turns out, is a concept that applies to oxygen. And researchers at the University of California at San Francisco are working on a small molecule, Hypoxystat, that can lower tissue oxygen levels and prevent damage when oxygen levels are too high. When administered to mice with the rare mitochondrial disorder Leigh syndrome, the molecule more than tripled their average lifespan.

In general, tumor cells embody the idea of “the survival of the fittest” gone out of control. Tumor cells outcompete their normal brethren with their uncontrolled growth; and the inside of a tumor is a fiercely competitive environment where over time, the most aggressive clones take over. But research published online in Nature on Feb. 19, 2025, has discovered that cancer cells cooperate as well as compete.