Healthcare
Explained: The 3 Major COVID-19 Variants
Explained: The 3 Major COVID-19 Variants
As billions of people gear up for widespread vaccination against COVID-19, another issue has reared its head. Three major COVID-19 variants have emerged across the globe—and preliminary research suggests these variants may be cause for concern.
But what makes them different from the original strain?
The following visualizations answer some key questions, including when these variants were first discovered, how far they’ve spread worldwide, and most importantly, their potential impact on the population.
Some Context: What is a Variant?
Before diving in, it’s important to understand why viruses mutate in the first place.
To infect someone, a virus takes over a host cell and uses it to replicate itself. But nature isn’t perfect, and sometimes, mistakes are made during the replication process—those mistakes are called mutations.
A virus with one or more mutations is referred to as a variant. Most of the time, variants do not affect a virus’s physical structure, and in those instances, they eventually disappear. However, there are certain cases when a mutation impacts part of a virus’s genetic makeup that does change its behavior.
According to the U.S. Centers for Disease Control (CDC) a change in behavior can alter:
- Rate of transmission
- Deadliness
- Ability to potentially infect someone with natural or vaccine-induced immunity
Preliminary research has detected some of these changes in the three major COVID-19 variants—B.1.1.7, B.1.351, and P.1.
The 3 Major COVID-19 Variants
The three major variants emerged at different times, and in different parts of the world. Here’s an overview of each variant, when they were discovered, and how far they’ve spread so far.
B.1.1.7
The B.1.1.7 variant was detected in the UK in the fall of 2020. By December 2020, it had spread across the globe, with cases emerging across Europe, North America, and Asia.
Currently, the variant has been reported in roughly 94 countries.
Early research suggests it’s 50% more transmissible than other variants, and potentially 35% more deadly than the standard virus. Luckily, studies suggest that some of the existing vaccines work well against it.
B.1.351
In October 2020, the second major variant was discovered—B.1.351. It was first identified in South Africa, but by end of the year, it had spread to the UK, Switzerland, Australia, and Japan.
There are approximately 48 countries with reported cases, and research suggests several of the existing COVID-19 vaccines may not be as effective against this variant.
P.1
The P.1 variant was the last to arrive on the scene.
It was first discovered in January 2021, when Japan reported four cases of the variant, which was found in travelers who had arrived from Brazil.
Approximately 25 countries have reported cases of the P.1 variant, and early research suggests this variant is not only more contagious, but could also have the ability to infect people with natural immunity who had already recovered from the original strain.
Still Early Days
While there have been preliminary studies showing a dip in vaccine effectiveness, some experts emphasize that it’s too early to tell for certain. More data is needed to gain a deeper and more accurate understanding.
In the meantime, experts are emphasizing the importance of following our current public health strategies, which include physical distancing, vaccination, washing your hands, and using masks.
Demographics
Charted: Global Tobacco Use by Country and Sex
This visual shows tobacco use by country and sex, highlighting which countries still have a high prevalence of smoking.
Charting Global Tobacco Use by Country and Sex
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Globally, rates of tobacco use have been falling for decades. Today, it is estimated that one-in-five people around the world use tobacco products, according to data from the World Health Organization (WHO).
That’s still enough people to have a sizable impact on both global healthcare and the environment. And the prevalence of tobacco use by country, and by sex, varies widely.
This chart shows current tobacco use in selected countries around the world using WHO estimates for 2022.
Which People Smoke the Most?
Below we examine the entire dataset of global countries by 2022 tobacco use. Estimates are of people aged 15 years and older and include both smoked and smokeless tobacco (including vaping). Countries that had no data for 2022 have been omitted.
In almost every country, males use tobacco more than females. Globally, 36% of men are tobacco users compared to just 8% of women.
Country | Total Prevalence (%) | Male (%) | Female (%) |
---|---|---|---|
🇦🇫 Afghanistan | 22.1 | 38.3 | 5.9 |
🇦🇱 Albania | 22.4 | 38.7 | 6.6 |
🇩🇿 Algeria | 21.6 | 41.9 | 0.7 |
🇦🇩 Andorra | 33.6 | 33.3 | 33.8 |
🇦🇷 Argentina | 23.1 | 28.2 | 18.1 |
🇦🇲 Armenia | 22.5 | 49.3 | 1.7 |
🇦🇺 Australia | 12.5 | 14.8 | 10.3 |
🇦🇹 Austria | 22.0 | 23.7 | 20.5 |
🇦🇿 Azerbaijan | 19.3 | 39.6 | 0.1 |
🇧🇸 Bahamas | 10.7 | 20.6 | 2.1 |
🇧🇭 Bahrain | 18.1 | 25.7 | 4.9 |
🇧🇩 Bangladesh | 31.1 | 48.9 | 14.2 |
🇧🇧 Barbados | 6.5 | 11.7 | 1.7 |
🇧🇾 Belarus | 27.9 | 47.2 | 12.0 |
🇧🇪 Belgium | 24.7 | 27.4 | 22.1 |
🇧🇿 Belize | 8.7 | 15.5 | 1.9 |
🇧🇯 Benin | 5.5 | 9.5 | 1.7 |
🇧🇹 Bhutan | 19.6 | 27.2 | 11.0 |
🇧🇴 Bolivia | 12.2 | 20.4 | 4.1 |
🇧🇦 Bosnia and Herzegovina | 35.1 | 41.0 | 29.5 |
🇧🇼 Botswana | 18.1 | 30.2 | 6.5 |
🇧🇷 Brazil | 12.3 | 15.7 | 9.1 |
🇧🇳 Brunei Darussalam | 17.1 | 31.3 | 2.2 |
🇧🇬 Bulgaria | 34.0 | 38.1 | 30.2 |
🇧🇫 Burkina Faso | 13.5 | 21.7 | 5.5 |
🇧🇮 Burundi | 10.0 | 15.2 | 5.0 |
🇨🇻 Cabo Verde | 10.5 | 16.2 | 5.0 |
🇰🇭 Cambodia | 16.1 | 27.3 | 5.5 |
🇨🇲 Cameroon | 5.6 | 10.2 | 1.1 |
🇨🇦 Canada | 11.4 | 13.7 | 9.2 |
🇹🇩 Chad | 6.8 | 12.3 | 1.4 |
🇨🇱 Chile | 28.2 | 30.6 | 25.8 |
🇨🇳 China | 24.9 | 47.3 | 2.0 |
🇨🇴 Colombia | 8.2 | 12.1 | 4.5 |
🇰🇲 Comoros | 16.2 | 26.2 | 6.2 |
🇨🇬 Congo | 15.0 | 28.2 | 2.0 |
🇨🇰 Cook Islands | 25.5 | 30.3 | 21.4 |
🇨🇷 Costa Rica | 8.8 | 13.2 | 4.5 |
🇨🇮 Cöte d'Ivoire | 8.6 | 16.4 | 0.7 |
🇭🇷 Croatia | 32.6 | 34.2 | 31.1 |
🇨🇺 Cuba | 18.5 | 26.9 | 10.4 |
🇨🇾 Cyprus | 34.0 | 46.0 | 22.1 |
🇨🇿 Czechia | 27.5 | 31.7 | 23.3 |
🇨🇩 Democratic Republic of the Congo | 11.1 | 19.9 | 2.6 |
🇩🇰 Denmark | 16.2 | 16.4 | 16.0 |
🇩🇴 Dominican Republic | 10.2 | 14.0 | 6.5 |
🇪🇨 Ecuador | 10.1 | 17.6 | 2.6 |
🇪🇬 Egypt | 24.7 | 48.9 | 0.3 |
🇸🇻 El Salvador | 8.3 | 15.6 | 1.9 |
🇪🇪 Estonia | 25.6 | 32.9 | 19.1 |
🇸🇿 Eswatini | 8.6 | 16.2 | 1.4 |
🇪🇹 Ethiopia | 4.6 | 7.8 | 1.4 |
🇫🇯 Fiji | 27.3 | 41.7 | 13.1 |
🇫🇮 Finland | 19.6 | 23.9 | 15.4 |
🇫🇷 France | 29.2 | 31.3 | 27.3 |
🇬🇲 Gambia | 9.6 | 18.7 | 0.6 |
🇬🇪 Georgia | 29.0 | 54.7 | 7.1 |
🇩🇪 Germany | 18.8 | 21.3 | 16.4 |
🇬🇭 Ghana | 3.1 | 5.9 | 0.3 |
🇬🇷 Greece | 29.6 | 33.1 | 26.3 |
🇬🇹 Guatemala | 12.0 | 22.7 | 1.7 |
🇬🇼 Guinea-Bissau | 7.5 | 14.8 | 0.6 |
🇬🇾 Guyana | 10.5 | 19.3 | 2.2 |
🇭🇹 Haiti | 7.3 | 12.6 | 2.3 |
🇭🇳 Honduras | 12.2 | 22.7 | 1.7 |
🇭🇺 Hungary | 29.4 | 34.7 | 24.5 |
🇮🇸 Iceland | 9.4 | 9.4 | 9.4 |
🇮🇳 India | 23.9 | 36.8 | 10.4 |
🇮🇩 Indonesia | 38.5 | 73.6 | 3.4 |
🇮🇷 Iran (Islamic Republic of) | 13.9 | 24.8 | 3.1 |
🇮🇶 Iraq | 18.7 | 36.0 | 1.6 |
🇮🇪 Ireland | 18.2 | 20.5 | 16.1 |
🇮🇱 Israel | 19.8 | 26.4 | 13.3 |
🇮🇹 Italy | 20.4 | 24.1 | 16.8 |
🇯🇲 Jamaica | 9.5 | 15.8 | 3.5 |
🇯🇵 Japan | 16.8 | 26.5 | 7.7 |
🇯🇴 Jordan | 36.3 | 57.8 | 13.4 |
🇰🇿 Kazakhstan | 21.7 | 38.2 | 6.9 |
🇰🇪 Kenya | 9.2 | 16.6 | 2.1 |
🇰🇮 Kiribati | 38.2 | 51.6 | 25.7 |
🇰🇼 Kuwait | 22.7 | 35.6 | 2.1 |
🇰🇬 Kyrgyzstan | 26.4 | 51.3 | 3.3 |
🇱🇦 Lao People's Democratic Republic | 25.8 | 43.2 | 8.4 |
🇱🇻 Latvia | 30.3 | 45.6 | 17.2 |
🇱🇧 Lebanon | 34.0 | 43.1 | 25.7 |
🇱🇸 Lesotho | 22.9 | 42.0 | 4.8 |
🇱🇷 Liberia | 7.1 | 12.5 | 1.7 |
🇱🇹 Lithuania | 27.9 | 40.1 | 17.3 |
🇱🇺 Luxembourg | 21.8 | 23.3 | 20.3 |
🇲🇬 Madagascar | 25.7 | 41.7 | 9.9 |
🇲🇼 Malawi | 7.1 | 13.0 | 1.7 |
🇲🇾 Malaysia | 22.6 | 43.8 | 0.7 |
🇲🇻 Maldives | 29.3 | 43.6 | 10.1 |
🇲🇱 Mali | 7.6 | 14.4 | 0.7 |
🇲🇹 Malta | 23.2 | 25.5 | 20.6 |
🇲🇭 Marshall Islands | 30.4 | 51.8 | 8.6 |
🇲🇷 Mauritania | 9.4 | 17.2 | 2.0 |
🇲🇺 Mauritius | 20.0 | 38.1 | 2.8 |
🇲🇽 Mexico | 14.6 | 23.1 | 6.9 |
🇲🇳 Mongolia | 29.3 | 52.6 | 7.3 |
🇲🇪 Montenegro | 32.1 | 30.9 | 33.2 |
🇲🇦 Morocco | 13.1 | 25.3 | 1.0 |
🇲🇲 Myanmar | 43.9 | 69.4 | 19.2 |
🇳🇦 Namibia | 12.5 | 21.3 | 4.7 |
🇳🇷 Nauru | 49.5 | 50.3 | 48.7 |
🇳🇵 Nepal | 24.9 | 42.7 | 9.4 |
🇳🇱 Netherlands (Kingdom of the) | 20.1 | 22.5 | 17.7 |
🇳🇿 New Zealand | 11.4 | 12.7 | 10.2 |
🇳🇪 Niger | 7.7 | 14.0 | 1.3 |
🇳🇬 Nigeria | 2.9 | 5.4 | 0.4 |
🇳🇴 Norway | 14.0 | 14.8 | 13.2 |
🇴🇲 Oman | 11.0 | 17.4 | 0.4 |
🇵🇰 Pakistan | 16.9 | 27.7 | 6.2 |
🇵🇼 Palau | 17.0 | 26.3 | 7.3 |
🇵🇦 Panama | 5.1 | 8.4 | 1.9 |
🇵🇬 Papua New Guinea | 40.4 | 55.4 | 24.9 |
🇵🇾 Paraguay | 10.6 | 17.4 | 3.8 |
🇵🇪 Peru | 7.0 | 11.6 | 2.6 |
🇵🇭 Philippines | 20.4 | 36.2 | 4.3 |
🇵🇱 Poland | 23.2 | 27.6 | 19.1 |
🇵🇹 Portugal | 20.9 | 27.1 | 15.5 |
🇶🇦 Qatar | 18.8 | 24.6 | 2.3 |
🇰🇷 Republic of Korea | 18.9 | 32.7 | 5.4 |
🇲🇩 Republic of Moldova | 27.8 | 52.7 | 6.3 |
🇷🇴 Romania | 27.5 | 37.4 | 18.5 |
🇷🇺 Russian Federation | 27.2 | 42.0 | 14.8 |
🇷🇼 Rwanda | 12.0 | 17.7 | 6.7 |
🇱🇨 Saint Lucia | 13.6 | 24.8 | 3.0 |
🇼🇸 Samoa | 22.2 | 31.0 | 13.2 |
🇸🇹 Sao Tome and Principe | 7.1 | 12.6 | 1.8 |
🇸🇦 Saudi Arabia | 17.4 | 28.4 | 2.1 |
🇸🇳 Senegal | 6.0 | 11.7 | 0.6 |
🇷🇸 Serbia | 36.6 | 38.8 | 34.6 |
🇸🇨 Seychelles | 20.8 | 34.6 | 5.7 |
🇸🇱 Sierra Leone | 11.4 | 17.3 | 5.5 |
🇸🇬 Singapore | 16.4 | 27.9 | 4.0 |
🇸🇰 Slovakia | 30.2 | 35.4 | 25.4 |
🇸🇮 Slovenia | 18.1 | 20.2 | 15.9 |
🇸🇧 Solomon Islands | 37.6 | 55.3 | 19.6 |
🇿🇦 South Africa | 20.3 | 35.1 | 6.5 |
🇪🇸 Spain | 24.9 | 27.5 | 22.5 |
🇱🇰 Sri Lanka | 19.1 | 37.8 | 2.4 |
🇸🇪 Sweden | 22.1 | 28.3 | 15.9 |
🇨🇭 Switzerland | 23.3 | 26.3 | 20.4 |
🇹🇭 Thailand | 18.9 | 37.7 | 1.8 |
🇹🇱 Timor-Leste | 37.6 | 64.5 | 9.8 |
🇹🇬 Togo | 5.6 | 10.2 | 0.9 |
🇹🇴 Tonga | 30.7 | 46.8 | 15.5 |
🇹🇳 Tunisia | 20.1 | 39.7 | 1.6 |
🇹🇷 Türkiye | 30.7 | 41.9 | 19.6 |
🇹🇲 Turkmenistan | 5.4 | 10.6 | 0.5 |
🇹🇻 Tuvalu | 33.8 | 48.3 | 19.0 |
🇺🇬 Uganda | 5.3 | 9.0 | 1.8 |
🇺🇦 Ukraine | 22.0 | 38.3 | 8.5 |
🇦🇪 United Arab Emirates | 11.7 | 15.5 | 2.5 |
🇬🇧 United Kingdom | 13.1 | 15.0 | 11.4 |
🇹🇿 United Republic of Tanzania | 7.5 | 13.1 | 2.2 |
🇺🇸 United States of America | 23.0 | 28.6 | 17.5 |
🇺🇾 Uruguay | 19.3 | 23.0 | 16.0 |
🇺🇿 Uzbekistan | 16.2 | 31.8 | 1.0 |
🇻🇳 Viet Nam | 22.8 | 44.3 | 2.2 |
🇾🇪 Yemen | 20.8 | 33.7 | 7.9 |
🇿🇲 Zambia | 12.0 | 21.8 | 2.7 |
🇿🇼 Zimbabwe | 9.2 | 19.0 | 0.8 |
From a regional perspective, we can see many countries in Europe and Asia have higher rates of tobacco use. Indonesia and Myanmar specifically have some of the highest tobacco use rates in the world, with 73.6% of Indonesian men estimated to smoke or use tobacco.
In many Asian countries we also see a greater difference between male and female smokers compared to the rest of the world. In China for example, 47.3% of males are estimated to use tobacco compared to just 2.0% of females.
On the other hand, the Americas and especially Africa have a lower prevalence of tobacco use. Nigeria at 2.9% had the lowest rate of tobacco use in the world in 2022.
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