Delhi recorded 399 fresh COVID-19 cases on Sunday, even as the positivity rate dipped to 0.51 percent, authorities said. The case tally in the city has gone past 6.30 lakh and the death toll due to the viral disease has mounted to 10,678, they said.

This month, 585 coronavirus cases were reported on January 1, 494 on January 2, 424 on January 3, 384 on January 4, 442 on January 5, 654 on January 6, 486 on January 7, 444 on January 8 and 519 on Saturday.

The tally of active cases dropped to 3,468 from 3,683 the previous day, while the positivity rate was recorded at 0.51 percent.

Delhi Health Minister Satyendar Jain said the city has been witnessing less than 1,000 fresh cases per day for the last 15 days.

"The COVID-19 situation in Delhi has improved a lot and it is now under control," he said.

COVID-19 Vaccine

Frequently Asked Questions

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.

Show

COVID-19 in Delhi: 399 fresh cases, 12 more deaths; positivity rate dips to 0.51%

The tally of active cases dropped to 3,468 from 3,683 the previous day, while the positivity rate was recorded at 0.51 percent.

Related stories