Kerala on Wednesday recorded 12,161 fresh COVID-19 cases and 155 deaths, which took the caseload to 46,64,971 and the toll to 24,965.
The number of people who recovered from the infection since Tuesday was 17,862, which brought the total recoveries to 44,95,904 and the number of active cases to 1,43,500, an official press release said.
As many as 90,394 samples were tested in the last 24 hours, it said.
Among the 14 districts, Thrissur recorded the highest number of cases with 1,541, followed by Ernakulam (1,526), Thiruvananthapuram (1,282), Kozhikode (1,275) and Malappuram (1,017).
Of the new cases, 86 were health workers, 64 from outside the state and 11,413 infected through contact, with the source of it not clear in 598.
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.
There are currently 4,56,952 people under surveillance in various districts, of whom 4,36,837 are in home or institutional quarantine and 20,115 in hospitals.Follow our full coverage of the coronavirus pandemic here.