South Korea reported 161 more coronavirus cases, taking the nationwide total to 763 and making it the world's largest total outside China.
The country has seen a rapid surge in the number of coronavirus cases since a cluster of infections emerged from a religious sect in the southern city of Daegu last week.
Most of the country's cases are connected to the Shincheonji Church of Jesus in the southern city of Daegu, including 129 of Monday's confirmations, the Korea Centers for Disease Control and Prevention said in a statement.
Two more people had died, it added -- both of them connected to a second cluster around a hospital in Cheongdo -- taking the toll to seven.
South Korean President Moon Jae-in on Sunday raised the country's virus alert to the highest "red" level, in a bid to strengthen the government response to the spiralling outbreak.
Frequently Asked Questions
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.
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.
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.