My understanding from what i read is, we were lucky that the knowledge was already there, and scientists were able to quickly develop vaccines specifically for this Coronavirus
Vaccinate to protect me: My understanding is that vaccines can protect me a lot. They may not protect me 100%, but they definitely can slow down the virus.
Vaccinate to protect others: My understanding is, the more unvaccinated people there are, the more the virus is able to sit in their bodies and mutate, and then spread that new version to others.
Vaccines most used in India are CoviShield and ...
Vaccines most used in India for boosters are Covovax or Corbevax. Three, four or more: what’s the magic number for booster shots? COVID vaccine boosters are proving a useful tool against Omicron, but scientists say that endless boosting might not be a practical or sustainable strategy. -- Clare Watson https://www.nature.com/articles/d41586-022-00200-9 28 jan 2022 Immunity against Covid-19 shoots up after Pfizer or Moderna booster, study shows "An mRNA booster after two jabs of inactivated or viral vector Covid-19 vaccines can provide high immunity against the virus, expert virologist Dr Yong Poovorawan" NationThailand.com https://www.nationthailand.com/life/40010681 2 jan 2022 Should Covid-19 booster dose be different from the initial vaccine? Yes -- more effective protection 'A booster is not the same as an “additional dose" of a vaccine, which may be required for some individuals where “the immune response rate following the standard primary series is deemed insufficient". “Immunocompromised individuals often fail to mount a ... protective immune response after a standard primary series, but also older adults may respond poorly to a standard primary series," WHO says.' Good details about boosters and general Covid vaccines. -- Kenneth Mohanty News18.com https://www.news18.com/news/explainers/explained-should-covid-19-booster-dose-be-different-from-the-initial-vaccine-4570754.html 20 dec 2021 Will we always need Covid-19 boosters? Experts have theories A lot of detail about how shots work. -- Helen Branswell STAT https://www.statnews.com/2021/12/15/will-we-always-need-covid-19-boosters-experts-have-theories/ 15 dec 2021 What does it mean if you don't have any vaccine or booster side effects? And more about boosters. NPR https://www.npr.org/sections/goatsandsoda/2021/12/10/1054030220/coronavirus-faq-what-does-it-mean-if-the-booster-knocks-me-out-what-if-it-doesnt 10 dec 2021 Third doses of COVID-19 vaccines reduce infection and transmission of SARS-CoV-2 and could prevent future surges in some populations "The benefit of a third [booster] dose in reducing transmission is sizeable and increases with vaccine coverage and contact rates among individuals." medRxiv https://www.medrxiv.org/content/10.1101/2021.10.25.21265500v1 21 oct 2021 About vaccine effectiveness studies "Until now there were only vaccine effectiveness reports without randomization, without a placebo control group, and multiple potential confounding factors. That’s what makes this trial report significant proof of benefit of booster shots, at least for this vaccine regimen." Good Twitter thread discussion. -- @EricTopol https://twitter.com/EricTopol/status/1451174284861132808 To boost or not to boost: The pros and cons of getting a third COVID shot Thai PBS World https://www.thaipbsworld.com/to-boost-or-not-to-boost-the-pros-and-cons-of-getting-a-third-covid-shot/ 20 sep 2021 Clarifying information about boosters "COVID Update: The very unclear story of boosters will become clear. I will try to sort it out. And attempt to be clear myself! 1/" Twitter thread. Good info. -- Andy Slavitt @ASlavitt https://twitter.com/ASlavitt/status/1439267006105075715 18 sep 2021 Discussing 3rd booster shots "Let me be clear about the evidence on 3rd shots. It is unequivocal for Pfizer's vaccine, given with 3-week spacing. In people over age 60, there is significant reduction of effectiveness (VE) vs hospitalizations and symptomatic infections at 5+ months after primary vaccination. /1" Twitter thread -- Eric Topol @EricTopol https://twitter.com/EricTopol/status/1437596362153988096 14 sep 2021 | "@EricTopol May be it is not an extra “booster” dose per se, but the missing last dose of the correct immunization schedule that going forward mRNA vaccines will need - that is the way Fauci presents this and I think is useful this description." -- Francisco De La Vega @ribozyme https://twitter.com/ribozyme/status/1437616470607859714 14 sep 2021 | "@skrymir42 @EricTopol So far studies have shown that a longer period between doses results in a more durable antibody response." -- Victoria Heckler @vheckler https://twitter.com/vheckler/status/1437600220209106950 15 sep 2021 | "@tq1 @EricTopol Moderna. Stronger than Pfizer and studies have shown benefits of mixing vaccines." -- Marsha MD MPH @MarshaMD3 https://twitter.com/MarshaMD3/status/1437636842845736961 14 sep 2021