The Delta variant of the coronavirus is the cause of more than 80 percent of new U.S. Covid-19 cases, but the authorized vaccines remain more than 90 percent effective in preventing hospitalizations and deaths, said top U.S. infectious disease expert Anthony Fauci during a U.S. Senate hearing on July 20.

The next Covid pandemic could be prevented by using a gene drive to preemptively edit the genome of bats to prevent them from becoming hosts for coronaviruses, according to a proposal by scientists from Israel’s Interdisciplinary Center (IDC) Herzelia and the National Institutes of Health (NIH).

Health agencies and vaccine and immunology experts have pushed back against Pfizer and BioNTech’s assertions that a Covid-19 booster shot is necessary.

Fewer Americans are dying from the most common types of cancer, especially lung, showed a report published in The Journal of the National Cancer Institute on July 8.

Genetic sequences from more than 200 virus samples of early Covid-19 cases mysteriously disappeared from an online scientific database. A researcher in Seattle reported the recovery of 13 of those original sequences.

The Delta variant of the novel coronavirus that was first found in India is the greatest threat to the United States’ effort to eradicate Covid-19 in the country’s borders, said U.S. infectious disease expert Dr. Anthony Fauci during a press call.

U.S. scientists are expanding a government-funded study that aims to directly answer the question of whether Moderna Inc.’s Covid-19 vaccine curbs the spread of SARS-CoV-2.

GlaxoSmithKline and Vir Biotechnology said final results from a late-stage study of their monoclonal antibody confirmed sotrovimab significantly reduced hospitalization and death among high-risk Covid-19 patients when given early in the disease.

A senior Chinese epidemiologist said the United States should be the priority in the next phase of investigations into the origin of Covid-19 after a study showed the disease could have been circulating there as early as December 2019, state media said on June 17.

Top U.S. infectious disease expert Dr. Anthony Fauci called on China to release the medical records of nine people whose ailments might provide vital clues into whether Covid-19 first emerged as the result of a lab leak, the Financial Times reported on June 3.