Your.MD and Imperial College of Science Technology and Medicine have launched the Covid-19 Symptom Mapper with the aim to collect self-reported population data from people who have either tested positive to Coronavirus or believe to have compatible symptoms but have not been tested.
The objective of the study is to collect enough data from each country to help researchers better understand how the virus affects people who do not require to be hospitalized.
Please note that all the data are anonymised and we intend to make it available to the wider scientific community. If you decide to leave your email for future communications, please note that it is not stored with your data.
As of 25 May 2020, 84788 people worldwide have provided data on their Covid-19 symptoms through Your.MD Covid-19 Mapper app, an increase of 5126 respondents in one week. 73.8% of the respondents reported at least 1 symptom. We further excluded people who self-diagnosed as not having Covid-19 unless they experienced fatigue, fever, cough and loss of smell or taste. In our final analysis, the sample size was 31409 (51% men, mean age = 37 (±13).
Fatigue, cough and sore throat remained three most common symptoms (57.1%, 52.4% and 52.3% respectively). Those who have been tested positive also reported headache (59.2%), muscle ache (59.8%) and anosmia (55.5%) as common symptoms. Women seemed to experience more chills, headache, muscle ache and loss of smell and taste than men.
Our further analysis of a subgroup of respondents who have been tested for Covid-19 showed that loss of smell or taste is strongly associated with a positive result. This, in fact, was the strongest predictor of whether or not someone was positive with the disease. Those who experienced anosmia were 4.1 times (95% CI: 3.2 - 5.2) more likely to test positive with Covid-19 compared with their counterparts who did not experience this symptom. This supports recent findings of a study led by researchers at King’s College London.
In roughly 56% of the sample, the symptoms lasted for a week or less. Yet, about 12% of the respondents said their symptoms persisted for over 3 weeks. Most people reported mild symptoms. This might be attributable to the fact that the sample mainly consisted of young people under the age of 40 (64%) without underlying health conditions.
Countries with the highest number of people with Covid-19 symptoms recorded in the Mapper were India (22.4%), the Philippines (16.3%), the UK (14.8%), Pakistan (8.9%), Mexico (7.3%), Nicaragua (5.2%) and Nigeria (4.7%).
These results are updated on a regular basis.
The table below shows the percentage of people that have mild, moderate or severe COVID-19. All data are self-reported
The table below shows the gender split of participants across the top 7 countries.
The table below shows the age distribution of participants.
|Under 40||40 - 59||60+|
The table below shows the number of days people reported to be unwell.
The table below shows the % of users who have reported any of the symptoms from the mapper compared to a study based on hospitalised patients in Wuhan, China.
|Symptom||% Mapper||% Study|
|Fatigue / Tiredness||57.1%||38%|
|Coughing up mucus (sputum)||37.8%||34%|
|Shortness of breath||33.7%||19%|
|Loss of smell and taste||21.1%||N/A|
The section below shows a breakdown of the severity of self diagnosis by age and the percentage breakdown for each symptom by gender and country.
|COVID-19 Severity ⓘ|
|Coughing up mucus (sputum) ⓘ||52.0%||48.0%%|
|Shortness of breath ⓘ||49.7%||50.3%|
|Muscle aches ⓘ||46.3%||53.7%|
|Sore throat ⓘ||50.5%||49.5%|
|Blocked nose ⓘ||52.4%||47.6%|
|Loss of smell and taste ⓘ||44.5%||55.5%|
|Coughing up mucus (sputum) ⓘ||17.0%||21.1%||16.1%|
|Shortness of breath ⓘ||20.2%||16.9%||18.9%|
|Muscle aches ⓘ||19.3%||16.5%||15.2%|
|Sore throat ⓘ||14.1%||22.5%||15.3%|
|Blocked nose ⓘ||15.8%||17.1%||13.9%|
|Loss of smell and taste ⓘ||21.3%||11.6%||9.4%|
You can help us map the pandemic by clicking on the following link and filling in the survey.
We can share the anonymised data from this research contact firstname.lastname@example.org.
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Previous version of statistics from May 18, 2020 can be found here.
Important: Our website provides useful information but is not a substitute for medical advice. You should always seek the advice of your doctor when making decisions about your health.