Vaccines have successfully curtailed viral diseases for decades. But as COVID-19 vaccination hesitancy shows, mistrust and misinformation continue to put lives at risk.
It is unlikely that we will reach full herd immunity for COVID-19. However, we are likely to reach a practical kind of herd immunity through vaccination.
Many developed countries have approved the use of the Pfizer vaccine in children as young as 12, even though they are a low-risk group.
As vaccine eligibility is expanded to adolescents and young adults, understanding who might be more likely to be vaccine hesitant, and why, can help inform public health strategies
What does the Seychelles experience tell us about variants, vaccine efficacy and herd immunity?
A scholar of the Rwandan genocide argues that while a genocide and a pandemic are very different, the experiences of Rwanda's survivors may provide lessons on how to heal from pandemic trauma.
Vaccination rates for COVID-19 have been lower than desired for herd immunity, or when enough people become immune for new infections to stop. What will life look like without it?
The vaccination levels needed to cross the line might not be achievable at all, even in the long term.
It's quite likely this virus will never be eliminated from the world. But even so, getting vaccinated enormously reduces your risk of severe outcomes like hospitalisation and death.
Stories of reaching herd immunity were certainly premature.
Surveys suggest people trust companies more than government and the media, showing they have an important role in helping end the pandemic.
The government should be explicit about what proportion of the population will need to be vaccinated to warrant border reopening. Australians could then measure progress towards that goal.
No one likes a long line. But privileging the rich and powerful – as has often been the case – may undermine trust in the vaccine rollout.
We can learn about the spread of diseases through populations by studying naturally occurring instances of herd immunity. Avian cholera in the Canadian Arctic provides a useful case study.
With a third of adults saying they likely won't get the vaccine, the US has a herd immunity math problem.
One university is showing how the vaccine corps concept can speed up vaccination rates, including launching a large-scale vaccination site staffed by hundreds of students and volunteers.
Getting a vaccine is proving difficult for many older people now, but the mad rush for the vaccine won't last long. Many people don't want to get one at all, and that will impede herd immunity.
The COVID-19 vaccine rollout has fallen far short of President Trump's promises. President Biden says he can fix that. Can he?
Vaccine hesitancy has resulted in multiple vaccine-preventable disease outbreaks. Research on vaccine hesitancy in South Africa is limited. But growing evidence suggests that it's becoming a problem.
New variants will push the number needed to reach herd immunity up.