Herd immunity helps improve survival in cases of epidemic.
does this has any value in the current scenario of covid-19 pandemic?
Just an example:
For herd immunity you need 60-70% of people being immune. Consider a case fatality rate of 2%. This would mean that in country with 80 milllion inhabitants 800 000 people would die when 50% of people have acquired immunity.
Yes, of course. The more people are immune the lesser transmissions will occur.
Yes definitely it will be helpful. But for herd immunity to develop most of the population of the area should get infected, survive and develop antibodies against covid 19.
https://www.theguardian.com/commentisfree/2020/mar/18/coronavirus-uk-expert-advice-wrong
https://theconversation.com/the-herd-immunity-route-to-fighting-coronavirus-is-unethical-and-potentially-dangerous-133765
Yes, herd immunity is potentially helpful in the fight against COVID-19 based on evidence from population vaccination. However, I think the reported re-infection cases in China necessitates studies on the degree to which herd immunity can work for this novel virus.
Maryah Kamal That ('herd immunity') was the original strategy the UK wanted to employ to slow SARS-CoV-2 spread. They had eventually abandoned it under tremendous pressure. According to a report (yesterday), "in UK, the fatalities from the outbreak at 4,934. According to health authorities, 47,806 people have tested positive for the virus." If they were stuck to 'herd immunity' strategy (instead of 'lockdown'), the number of death toll and 'positive' people could be much larger than what is right now.
Yes, herd immunity can help to slow the COVID-19 transmission especially in countries with much of their populations are young. However, in the current fatality rate of this pandemic we could end up with many more death.
Thank you so much everyone dor answering and showing interest. it really gave me valuable information
Just an example:
For herd immunity you need 60-70% of people being immune. Consider a case fatality rate of 2%. This would mean that in country with 80 milllion inhabitants 800 000 people would die when 50% of people have acquired immunity.
Yes, collective social resilience is already starting to work. 80% people who have been or are infected with the SARS-CoV-2 Coronavirus do not have Covid-19 disease at all, or have this disease very mildly with symptoms of so-called ordinary colds. This is the effect of the development of social collective resilience. The rate of development of social immunity can be accelerated by the use of therapeutic therapies already in some countries based on the administration of plasma to patients with Covid-19 disease with antibodies produced in the body of a person who had previously been infected with the SARS-CoV-2 Coronavirus and recovered from this diseases.
Greetings,
Dariusz Prokopowicz
I think that this strategy was a reason for the emergence of more dangerous new strains of covid-19, because it was allowed to spread and duplicate too much. Add to the possibility of infection again.
Measles, mumps, polio, and chickenpox are examples of infectious diseases that were once very common but are now rare because vaccines helped to establish herd immunity. We sometimes see outbreaks of vaccine-preventable diseases in communities with lower vaccine coverage because they don’t have herd protection.
For infections without a vaccine, even if many adults have developed immunity because of prior infection, the disease can still circulate among children and can still infect those with weakened immune systems. This was seen for many of the aforementioned diseases before vaccines were developed.
Other viruses (like the flu) mutate over time, so antibodies from a previous infection provide protection for only a short period of time. For the flu, this is less than a year. If SARS-CoV-2, the virus that causes COVID-19, is like other coronaviruses that currently infect humans, we can expect that people who get infected will be immune for months to years, but probably not their entire lives.
https://onlinelibrary.wiley.com/doi/abs/10.1002/jmv.25870
https://jamanetwork.com/journals/jama/fullarticle/2766096
https://judithcurry.com/2020/05/10/why-herd-immunity-to-covid-19-is-reached-much-earlier-than-thought/amp/
https://www.discovermagazine.com/health/is-herd-immunity-our-best-weapon-against-covid-19
https://www.mcgill.ca/oss/article/covid-19/herd-immunity-against-covid-19-theres-big-catch
In the case of SARS‐CoV2, achieving herd immunity is challenging due to rapid loss of protective immunity.
Source: Preprint Human coronavirus reinfection dynamics: lessons for SARS-CoV-2
Yes but needed much time for that happening and effected people by chronic diseases associated with diabetes, heart diseases and liver failure etc types patient will be face danger situation.
Please have a look at the link below:
Article Herd immunity – estimating the level required to halt the CO...
Herd immunity without vaccination is just a dangerous game for any country either developed or developing, no country is yet interested to go for that. WHO does not think so. Where there is chance of less immunity and not long lasting immunity, infection does not make sure about immunity for long then. Even mutation is another problem for novel coronavirus although it's slow.
Sweden's soft strategy was not for herd immunity rather they tried to avoid lockdown by using face masks and strictly maintaining social distancing.
Mutation has been reported too in many countries.
A global study has found strong evidence that a mutated new form of the coronavirus has spread from Europe to the US.
The mutation makes the virus more likely to infect people, but does not seem to make them any sicker than earlier variations, an international team of researchers reported Thursday.
"It is now the dominant form infecting people," said Erica Ollmann Saphire of the La Jolla Institute for Immunology and the Coronavirus Immunotherapy Consortium, who worked on the study. "This is now the virus."
The team's experiments show the mutated version is more infectious than other variations.
July 3, CNN
Yes! Please see the RG link below.
Article Herd Immunity and Implications for SARS-CoV-2 Control
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