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New Year arrives with US hitting 20 million COVID cases

The US has floundered in its efforts to quell the virus, which is spreading rapidly across the country and has already caused more than 347,000 deaths -- by far the highest national death toll.

January 02, 2021 / 12:12 IST
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The United States marked the New Year on Friday by passing the extraordinary milestone of 20 million COVID-19 cases, after global celebrations welcoming in 2021 were largely muted by the pandemic.

The US has floundered in its efforts to quell the virus, which is spreading rapidly across the country and has already caused more than 347,000 deaths -- by far the highest national death toll.

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Worldwide hopes that COVID-19 vaccines will bring a rapid end to the pandemic in 2021 have been shaken by the slow start to the US vaccination program, which has been beset by logistical problems and overstretched hospitals.

Nearly 2.8 million people in the US have already received their first jabs, but the figure fell well behind the 20 million inoculations that President Donald Trump's administration promised by the end of 2020.

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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