COVID-19 vaccine

Updated at 5:38 p.m. ET

Two coronavirus studies have been put on pause by drugmakers as they investigate safety concerns.

The pauses are not uncommon or cause for undue concern, but they highlight how little is known about the combination of medications prescribed to President Trump following his COVID-19 diagnosis.

Johnson & Johnson paused all clinical trials of its experimental COVID-19 vaccine after a study participant became sick with an "unexplained illness."

China has joined a global effort aimed at fair and equitable distribution of a COVID-19 vaccine once one becomes available — an effort the Trump administration has shunned.

The COVID-19 Vaccine Global Access Facility, known as COVAX, is jointly led by the World Health Organization and Gavi, an alliance promoting access to vaccines.

Updated at noon ET

The U.S. Senate is holding a hearing Wednesday on the development of vaccines aimed at eradicating the coronavirus amid escalated political rhetoric regarding the potential effectiveness of a fast-tracked vaccine.

As President Trump has promised to expedite treatments against the virus that has killed nearly 190,000 Americans, he has appeared publicly rankled by critics who question his handling of the pandemic and those who are skeptical of the viability of a safe vaccine in such record time.

Nine drug companies pledged Tuesday that they will not submit vaccine candidates for FDA review until their safety and efficacy is shown in large clinical trials. The move is intended to bolster public confidence amid the rush to make a COVID-19 vaccine widely available, and counter fears of political pressure to have a vaccine before the November presidential election.

WPLN News

Later this month, Vanderbilt University Medical Center will start enlisting 1,000 volunteers for a COVID-19 vaccine trial.

Once upon a time, developing a new vaccine was a step-by-step process that went from concept, to design, to tests in humans, to regulatory approval, to manufacturing.

It was a process that could take a decade or more.

But the urgent need for a COVID-19 vaccine has radically changed all that. Now, the hope is the entire process can be completed in a year or less.

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