Delhi's daily coronavirus infection tally crossed the 5,000-mark for the first time on October 28 as the national capital witnessed a sudden spike in cases in the past few days. According to a health department bulletin, the national capital recorded 5,673 fresh COVID-19 cases, the highest single-day spike here till date, taking the total caseload to over 3.7 lakh.
Forty new fatalities were recorded, pushing the death toll in the national capital to 6,396, the bulletin said, adding that the fresh figure included one death which had occurred in August.
The previous highest single-day spike of 4,853 cases was recorded on Tuesday.
The number of fresh cases recorded on Monday stood at 2,832, and 4,136 on Sunday, while the figures were 4,116 on Saturday and 4,086 on Friday.
The 5,673 fresh cases on Wednesday came out of the 60,571 tests conducted the previous day.
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.
The active cases tally on Wednesday rose to 29,378 from 27,873 the previous day, according to the bulletin.
The bulletin said that the total number of cases has climbed to 3,70,014.Follow our full coverage of the coronavirus pandemic here.