Kerala registered 5,643 fresh COVID-19 cases on Sunday, taking the total caseload to almost six lakh, while the toll mounted to 2,223 with 27 related deaths, Health minister K K Shailaja said.
As many as 5,861 have been cured of the infection, and so far 5,32,658 have recovered while 64,589 people are undergoing treatment. The total cases has touched 5.99 lakh.
In the last 24 hours, 49,775 samples had been sent for testing, the minister said in a press release.
The test positivity rate has climbed to 11.34 percent. So far 62,27,787 samples have been sent for testing.
Of the positive cases, 34 are health workers, 87 people had come from outside the state, 4,951 were infected through contact. Kozhikode accounted for 851 cases, the highest today, followed by Malappuram 721, Thrissur 525 and Ernakulam 512. Kasaragod recorded 122 cases, the least.
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.