World Health Organization (WHO)

We landed on the moon. We mapped the genome. Yet as of 2024, over 280 million people — roughly 3% of the world population — were still living with chronic Hepatitis B and Hepatitis C. The 2026 Global #Hepatitis Report out now bit.ly/4vUyLKv

1.3 million people died from viral hepatitis B and C in 2024. Around 85% were hepatitis B related deaths. Since 2015, hepatitis B-related deaths have risen by 17% due to limited diagnosis and treatment. This is unacceptable. Read our latest report breaking down how hepatitis still affects and claims lives

“My parents protected me through vaccination and today I do the same for my son.” -Mubina, Uzbekistan Your decision makes a difference. Get vaccinated bit.ly/4mH2HWi #VaccinesWork #WorldImmunizationWeek

Some statistics stops you in your tracks. #DYK, everyday, nearly 5000 people are newly-infected with viral #hepatitis? Read the latest numbers in our report bit.ly/4vUyLKv

Some family traditions are worth passing on: now is the time to make sure everyone in the next generation benefits from lifesaving vaccines bit.ly/4mH2HWi #VaccinesWork #WorldImmunizationWeek

“During my childhood, up to 2 million people a year died of smallpox.” -Joe, UK Your decision makes a difference. Get vaccinated bit.ly/4mH2HWi #VaccinesWork #WorldImmunizationWeek

Did you know? Trachoma is the leading infectious cause of blindness worldwide. Find out more about the disease and how it can be prevented, treated and eliminated.

In 2025, WHO responded to - 66 emergencies, - across 88 countries, - including 33 million medical consultations through health partners in Gaza. Learn more about WHO’s work for health emergencies and in humanitarian contexts 👉 bit.ly/42oX59G #StandWithScience

How many doses of measles vaccine gives full protection against the disease? Hint: One is not enough. bit.ly/4mH2HWi #WorldImmunizationWeek

Behind every healthy child in Pakistan, there is someone who showed up for them. Sohail Asghar is one of over 15,000 WHO-trained vaccinators using science to protect millions of children from vaccine-preventable diseases. #WorldImmunizationWeek #StandWithScience

Science is changing what it means to age well. That's worth celebrating — and investing in. Today's daily dose. 🔬 #StandWithScience

Vaccines protect people at every stage of life: from a child’s first days through adulthood and beyond. In early childhood, immune systems are still developing, leaving young children more vulnerable to serious illness. That’s why most routine vaccines are given in the first two years of life, offering protection when it matters most. As children grow into their teenage years, booster doses help keep that protection strong and respond to new and emerging health risks. During pregnancy, vaccination plays a crucial role in protecting both parent and baby. Recommended vaccines help pass protective antibodies to babies before birth, giving them a safer start in life. In adulthood and older age, the immune system naturally becomes less robust. Vaccines help reduce the risk of severe illness and hospitalization, helping people stay healthy and live longer. Vaccination is about care, prevention and giving every generation the chance to learn, grow and thrive bit.ly/4mH2HWi #VaccinesWork #WorldImmunizationWeek

Some family traditions are worth passing on: now is the time to make sure everyone in the next generation benefits from lifesaving vaccines bit.ly/4mH2HWi #VaccinesWork #WorldImmunizationWeek

If you’re pregnant or thinking about it, this matters. Vaccination during pregnancy plays an important role in protecting both mother and baby. Recommended vaccines help pass protective antibodies to your baby before birth — offering early protection and peace of mind. Your decision makes a difference. Get vaccinated.

“I see vaccination as a civic responsibility.” -Elisa, Italy Your decision makes a difference. Get vaccinated bit.ly/4mH2HWi #VaccinesWork #WorldImmunizationWeek

Mental health matters. Did you know? Globally, 1 billion+ people live with a mental health condition. In 2025, the number of countries with access to emergency mental health and psychosocial support systems nearly doubled, increasing overall coverage from 28% to 48% worldwide. Read the report to learn how WHO supported strengthening of mental health systems 👉 bit.ly/42oX59G #StandWithScience

More children now live to celebrate their first birthday and then go on to learn, work, raise families and grow old — than at any other time in history. Your decision makes a difference. #VaccinesWork bit.ly/4mH2HWi #WorldImmunizationWeek

#Malaria doesn’t wait. When funding falls and programmes weaken, it comes back fast, killing hundreds of thousands more children and reversing hard-won gains. Underinvestment threatens economic growth, strains health systems, and puts a generation at risk. Sustain investment. Protect progress. Save lives. #EndMalaria Know more: bit.ly/4ewj1XF

The progress made against diseases like measles and polio took decades to achieve. But when immunization coverage weakens, this progress can be reversed. This #WorldImmunizationWeek, let’s commit to protect the gains we’ve made, reach children still being missed, and keep immunization strong bit.ly/4mH2HWi #VaccinesWork

It’s #WorldMalaria Day Science is moving fast and for the first time, #EndMalaria is within reach. New vaccines, treatments, malaria control tools, and pioneering technologies, including genetic modification of mosquitoes and long-acting injectables, are in development. Already, 25 countries are rolling out malaria vaccines to target 10 million children a year. New generation mosquito nets now make up most nets in use. Countries are leading the way. Together for health. #StandWithScience