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Global coronavirus cases surpass 5 million, infections rising in South America

It represents a new phase in the virus' spread, which initially peaked in China in February before large-scale outbreaks followed in Europe and the United States.

May 21, 2020 / 08:34 AM IST

Global coronavirus cases surpassed 5 million on Wednesday, with Latin America overtaking the United States and Europe in the past week to report the largest portion of new daily cases globally.

It represents a new phase in the virus' spread, which initially peaked in China in February before large-scale outbreaks followed in Europe and the United States.

Latin America accounted for around a third of the 91,000 cases reported earlier this week. Europe and the United States each accounted for just over 20%.

A large number of those new cases came from Brazil, which recently surpassed Germany, France and the United Kingdom to become the third-largest outbreak in the world, behind the United States and Russia.

Cases in Brazil are now rising at a daily pace second only to the United States.

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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The first 41 cases of coronavirus were confirmed in Wuhan, China, on Jan. 10 and it took the world until April 1 to reach its first million cases. Since then, about 1 million new cases are reported every two weeks, according to a Reuters tally.

At more than 5 million cases, the virus has infected more people in under six months than the annual total of severe flu cases, which the World Health Organization estimates is around 3 million to 5 million globally.

The pandemic has claimed over 326,000 lives, though the true number is thought to be higher as testing is still limited and many countries do not include fatalities outside of hospitals. Over half of the total fatalities have been recorded in Europe.

Despite the continued increase in cases, many countries are opening schools and workplaces following weeks of lockdown that have stemmed the spread.

Financial markets have also been boosted slightly by promising early results from the first U.S. vaccine trial in humans.

Reuters
first published: May 21, 2020 08:27 am

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