Gavi

Hi Bluesky! 👋 For 25 years we’ve worked to protect over 1.2 billion children from preventable diseases and today we help provide vaccines for half the world’s children. Follow us for science-backed health stories, global health insights and daily proof that #VaccinesWork. 💪

That itchy mosquito bump might be silencing your immune system. New research shows orthoflaviviruses like Zika and West Nile virus inject genetic decoys straight into mosquito saliva to bypass our defences before the body even knows it’s under attack. Read more: bit.ly/4e0c6VT

Recent research suggests that undernourished children may mount weaker immune responses to some vaccines, potentially leaving them more vulnerable to infection. Linda Geddes breaks down the latest research: bit.ly/48agfmB

The XFG COVID-19 variant has been circulating since at least January 2025 and now accounts for nearly half of sequenced samples worldwide. Here’s everything you need to know about the ‘American COVID’ variant: bit.ly/4eHSl5w

We’ve reached a historic turning point in the fight against malaria. Malaria vaccines have now reached ✨24 African countries ✨ with Burundi, Ethiopia, Guinea, Mali, Togo, Uganda and Zambia introducing the life-saving rollout in 2025. Read more about this milestone: www.gavi.org/progress-rep...

Mounting evidence suggests that some vaccines offer less protection to children affected by undernutrition. Could improving children’s nutrition also help to strengthen the protection that vaccines provide? bit.ly/48agfmB

In the wake of Nepal’s devastating August floods, health officials quickly mobilised to launch a rapid cholera vaccination campaign. As climate-related shocks become more frequent, learn how Nepal is preparing for future crises: bit.ly/4BwbktQ

What does it take to deploy new tuberculosis vaccines that could save ~7.3 million lives over the coming decades? We asked the experts: bit.ly/47sZnr5

The lower the cost, the greater the impact! We’re proud to announce our new deal with UNICEF to reduce the price of the RTS,S/AS01 malaria vaccine by approximately 40%, saving US$ 50 million between 2027-2029: bit.ly/4kaLpkU

In 2025 countries immunised more than 73 million children with Gavi support, more than in any previous year. This takes the total since 2000 past 1.3 billion, which is roughly one in six people alive today. Here’s how immunisation is helping build more equitable future: www.gavi.org/progress-rep...

Vaccines are often said to be victims of their own success because people forget how devastating these preventable diseases can be. But when vaccine rates fall, these forgotten diseases can return with a vengeance, with devastating consequences: bit.ly/482xuWU Via The Conversation

The XFG variant, AKA the ‘American COVID’ variant, has been circulating for more than a year and is currently the most common form of SARS-CoV-2 globally. Here's everything you need to know: bit.ly/4eHSl5w

How can studying healthy gut bacteria uncover clues on how to tackle the growing threat of antibiotic resistance? Here’s what one disease ecologist discovered when studying residents of a densely populated urban informal settlement in Nairobi, Kenya: bit.ly/4jpPvFH Via The Conversation

Equity in health isn't just an ideal, it's actively happening. In 2025, DTP3 coverage reached 82% in Gavi-supported countries, closing the gap with the global average (85%) to a historic low. Read the full breakdown on this and other achievements in immunisation: www.gavi.org/progress-rep...

We know vaccinated children have better education outcomes, but could classrooms be the key to higher vaccination rates? In Malawi, school-based vaccinations supported by parent-teacher associations are proving effective in the battle against a measles resurgence: bit.ly/4ySHdeh

A new global survey from Wellcome Trust spanning 140 countries found that people who feel left behind are also less likely to say they trust science, especially when healthcare and the benefits of research feel out of reach. Read the full story: bit.ly/4inkUaK via SciDevNet

In Pakistan, doctors are reporting a troubling rise in children affected with SSPE, a brain disease linked to measles infections that is almost universally fatal. What doctors are seeing, and how vaccination helps: bit.ly/4yZ8ZpG

Cervical cancer is preventable, and we are accelerating the fight to eliminate it. In 2025, a record-breaking 35 million+ girls received the HPV vaccine in a single year, bringing the number of girls to 95 million. Learn more about this historic achievement: www.gavi.org/progress-rep...

A study of 60,000 women confirms that COVID-19 vaccines have no impact on fertility or pregnancy outcomes. Dig into the findings: bit.ly/4aoYUXH

Two children can catch the same virus and have very different outcomes. A new study of 333 South African children found distinct patterns of gene activity and immune response in those with severe respiratory infections, including COVID-19. Here’s what scientists are learning: bit.ly/4yvw960

Just how bad will this winter’s flu season be? The southern hemisphere – now wrapping up their own winter season – offers some clues, and so far the picture looks fairly moderate. Here’s what we know so far and what researchers are still closely watching: bit.ly/4BnooBI

Ghana’s progress against malaria is remarkable: a 98% drop in malaria deaths between 2011 and 2025. With elimination now considered within reach, here’s how Ghana is getting closer to eliminating one of the world’s oldest diseases: bit.ly/4e80yQg

In 2000, as many as one in four children in Sierra Leone were not expected to make it to their fifth birthday. This led authorities to set a hugely ambitious target for the country: 0️⃣ preventable maternal deaths 0️⃣ preventable child deaths 0️⃣ zero-dose children Read more: bit.ly/4yK0JJT

Outbreaks move fast, so our responses must move faster. ✈️ One way we do that is with VACCINE STOCKPILES. But how do they actually work? Our latest VaccinesWork YouTube explainer breaks down the global good keeping us all safe. 🎬 Watch the full video on YouTube ➡️ www.youtube.com/watch?v=GUwz...

No child should be left without basic immunisation, and new data shows that vaccines have pushed further than ever into remote communities to ensure every last child is protected. Read more about how Gavi is reaching zero-dose children around the world: www.gavi.org/progress-rep...

Scientists have found genetic traces of an ancient disease in medieval parchment, once made from animal skin, dating back more than a thousand years. Here’s how those ancient pages are helping researchers reconstruct the history of sheeppox: bit.ly/4igVziG via The Conversation

❓“Will giving my baby multiple vaccines at once overload their immune system?” The quick answer: No. Decades of studies confirm that multiple vaccines don’t overwhelm immunity, don’t increase infection risk and don’t cause chronic illness. The full story: bit.ly/3VyWfXZ

73% of more than 1,000 surveyed healthcare professionals said they had seen an increase in heat-related complications during pregnancy over the past five years. More than 75% also reported more harm to foetuses or newborns. Maternal health must be part of the climate conversation: bit.ly/4B3sDCb

Could parasitic worms actually teach us something about treating immune diseases? Researchers are studying the molecules they use to survive inside the body, and whether those same tricks could one day help control harmful inflammation. Read more: bit.ly/4doU7Io via The Conversation

Good health is priceless... but it also pays off. Since 2000, Gavi’s immunisation programs have generated over US$ 308 billion in economic benefits for lower-income countries by preventing illness, lowering healthcare costs and keeping children healthy and productive. www.gavi.org/progress-rep...

Cancer isn’t contagious. Except, occasionally, when it is. In dogs, Tasmanian devils, clams and now catfish, scientists have found cancers that can physically pass from one animal to another and continue growing in a new host. Here’s how these strange cases are blurring the lines: bit.ly/4dV0Z0c

The recent death of a Russian plague researcher has revived a question scientists have been working on for more than 100 years: how do we vaccinate effectively against plague, especially its rare but deadly pneumonic form? Here’s what we know about existing vaccines and what's next: bit.ly/3VE8ySK

“When a mother understands what the vaccine protects her child from, she no longer needs to be persuaded. She makes the decision herself.” In a remote corner of Uzbekistan, one nurse is showing what can be achieved when vaccine confidence is built on trust and respect. bit.ly/3Ud7iph

Population movements can create gaps in healthcare, especially for children whose vaccination records are incomplete or missing. As nearly 60,000 Malawians returned from South Africa, health workers used temporary arrival centres to screen children and provide catch up vaccines: bit.ly/479jgmI

A lab worker at a Russian plague research institute has died after developing severe pneumonia, prompting speculation about pneumonic plague. But the cause of death has not been confirmed and the WHO says the current public health risk appears low. So what’s going on? bit.ly/4iae5Iv

In Uganda’s meningitis belt, vaccination helped drive meningitis A cases down by 99% across the region by 2021. Today, many young people in eastern Uganda have never seen the disease at all. A reminder that prevention only works if awareness and vaccination continue. Read more: bit.ly/4yxjEr4

A community can look well protected against measles on paper and still contain pockets where an outbreak can take hold. New research analysing vaccination data from more than 50,000 US schools found that broader county averages often masked much lower coverage in individual schools. bit.ly/3VuQ0nW

In Uganda, nearly 79,000 people are currently living with albinism. Harmful myths and stigma about the condition put this community at risk of missing out on routine vaccines. Advocacy group SNUPA is changing that, achieving an incredible 99% vaccination rate among its members: bit.ly/47tbrIA

Countries already carry the day-to-day responsibility of delivering health services. The next phase of global health reform is about making that easier, with fewer duplicative systems, better aligned partners and more room for countries to lead: bit.ly/4ASJ3NO

For centuries, rinderpest haunted cattle herds across the world, devastating the communities that depended on them. Then, in 2011, it became only the second disease humanity had ever eradicated. The remarkable story of how it happened, via VaccinesWork: bit.ly/4yeVBNw