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Gilead says remdesivir helped moderate COVID-19 patients improve

At Day 11, a higher proportion of patients in the 5-day treatment group achieved improvement in clinical status versus the standard of care group, Gilead said.

June 01, 2020 / 19:00 IST
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Gilead Sciences Inc said on Monday its antiviral drug remdesivir showed improvement in patients with moderate COVID-19 in a late-stage study.

Remdesivir is being closely watched after the U.S. Food and Drug Administration granted emergency use authorization last month, citing results from another study run by the National Institutes of Health that showed the drug reduced hospitalization stays by 31%, or about four days, compared to a placebo.

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Those results were seen as particularly significant as there are no approved drugs or vaccines for the new coronavirus, although many medicines approved for other conditions, as well as experimental treatments, are being tested to see if they may alter the course of COVID-19, the illness caused by the novel coronavirus.

The new results announced by Gilead on Monday are from a study designed to evaluate the safety and efficacy of 5- and 10-day treatment with remdesivir in addition to standard of care for patients with moderate COVID-19, compared with standard care alone.

COVID-19 Vaccine
Frequently Asked Questions

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How does a vaccine work?

A vaccine works by mimicking a natural infection. A vaccine not only induces immune response to protect people from any future COVID-19 infection, but also helps quickly build herd immunity to put an end to the pandemic. Herd immunity occurs when a sufficient percentage of a population becomes immune to a disease, making the spread of disease from person to person unlikely. The good news is that SARS-CoV-2 virus has been fairly stable, which increases the viability of a vaccine.

How many types of vaccines are there?

There are broadly four types of vaccine — one, a vaccine based on the whole virus (this could be either inactivated, or an attenuated [weakened] virus vaccine); two, a non-replicating viral vector vaccine that uses a benign virus as vector that carries the antigen of SARS-CoV; three, nucleic-acid vaccines that have genetic material like DNA and RNA of antigens like spike protein given to a person, helping human cells decode genetic material and produce the vaccine; and four, protein subunit vaccine wherein the recombinant proteins of SARS-COV-2 along with an adjuvant (booster) is given as a vaccine.

What does it take to develop a vaccine of this kind?

Vaccine development is a long, complex process. Unlike drugs that are given to people with a diseased, vaccines are given to healthy people and also vulnerable sections such as children, pregnant women and the elderly. So rigorous tests are compulsory. History says that the fastest time it took to develop a vaccine is five years, but it usually takes double or sometimes triple that time.
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