Millions of people worldwide have been infected with COVID-19 and so far, more than a million have lost their lives because of the pandemic. A huge global research effort is taking place to bring a fast-tracked vaccine to the market. Currently there are more than 165 vaccines being developed, with some already in human trials.
Even when a safe and effective COVID-19 vaccine or treatment is eventually developed, further challenges will emerge with regard to the manufacturing and distribution process. There is a threat that 'vaccine nationalism' could have negative consequences on how well the global pandemic is managed and contained.
There are an estimated 272 million international migrants – 3.5% of the world’s population.
While most people leave their home countries for work, millions have been driven away due to conflict, violence and climate change.
Most migrants come from India; the United States is the primary destination.
There are an estimated 272 million international migrants around the world. And while that equals just 3.5% of the world’s population, it already surpasses some projections for 2050. Since 1970, the number of people living in a country other than where they were born has tripled.
The world continues to experience an unprecedented and sustained change in the age structure of the global population, driven by increasing levels of life expectancy and decreasing levels of fertility. People are living longer lives, and both the share and the number of older persons in the total population are growing rapidly. Globally, there were 727 million persons aged 65 years or over in 2020. Since women live longer than men, on average, they comprise the majority of older persons, especially at advanced ages. Over the next three decades, the number of older persons worldwide is projected to more than double, reaching over 1.5 billion in 2050. All regions will see an increase in the size of the older population between 2020 and 2050.
In 2020, the COVID-19 pandemic affected drastically all forms of human mobility, including international migration. Around the globe, the closing of national borders and severe disruptions to international travel obliged hundreds of thousands of people to cancel or delay plans of moving abroad. Hundreds of thousands of migrants were stranded, unable to return to their countries, while others were forced to return to their home countries earlier than planned, when job opportunities dried up and schools closed.
Our World in Data's vaccination dataset uses the most recent official numbers from governments and health ministries worldwide. The population estimates used to calculate per-capita metrics are all based on the last revision of the United Nations World Population Prospects.
With the widespread rollout of COVID-19 vaccines globally, some countries have started to consider mandatory vaccination, although no country has yet to make vaccines mandatory for its population. While COVID-19 has resurfaced the debate on vaccination policies, it has been an important topic for many other diseases. The World Health Organization (WHO) estimates that vaccines save two to three million lives each year (excluding COVID). The development of vaccines against vaccine-preventable childhood diseases has been a key driver in the decline of child mortality.