Virus wiki
COVID-19
COVID-19 is respiratory disease caused by SARS-CoV-2. Global surveillance tracks cases, severity, and regional pressure to highlight emerging waves and healthcare stress.
Snapshot: 5/10/2026, 10:57:16 AM · 527 tracked locations · 137,222,712 active cases (dataset)
Important
Virus Tracker provides aggregated outbreak monitoring for education and situational awareness. It is not medical advice, a diagnostic service, or a substitute for guidance from qualified health professionals or official public health agencies. Always consult licensed clinicians and authoritative sources for personal health decisions.
Overview
Coronavirus disease 2019 (COVID-19) emerged as a pandemic pathogen with broad geographic spread. Surveillance combines laboratory-confirmed cases, mortality reporting, and recovery metrics. Variant dynamics and vaccination coverage continue to shape transmission intensity in different regions. Analysts watch lagging indicators such as hospital utilization alongside case counts. This wiki summarizes how Virus Tracker surfaces country-level and subnational signals so operators can compare relative burden across geographies. Data blends open feeds and resilient fallbacks; confidence metadata helps interpret uncertainty where reporting is uneven.
Transmission
SARS-CoV-2 spreads primarily through respiratory droplets and aerosols in shared airspace, with risk elevated in crowded, poorly ventilated settings. Contact with contaminated surfaces plays a smaller role. Infectiousness varies by variant, symptom status, and individual immune history. Public health guidance emphasizes ventilation, masking in high-risk contexts, and staying home when symptomatic. Travel and large gatherings can accelerate introductions between regions, which is why geographic heat maps remain useful for spotting redistribution of pressure.
Symptoms & clinical notes
Illness ranges from asymptomatic infection to severe pneumonia and multisystem complications. Common symptoms include fever, cough, fatigue, anosmia, sore throat, and headache. Severe disease is more frequent among older adults and people with underlying conditions, though healthy individuals can also experience prolonged symptoms. Clinicians use testing and clinical criteria; self-assessment cannot replace professional evaluation.
Prevention & control
Layered prevention includes vaccines where available and recommended, improving indoor air quality, hand hygiene, and reducing exposure when community levels rise. Organizations may add testing and isolation policies aligned with local regulations. Travelers should follow destination requirements and monitor for symptoms after exposure. No single measure eliminates risk; combined strategies reduce incidence and severe outcomes at population scale.
Surveillance context
Effective COVID-19 surveillance combines case reporting, variant sequencing where feasible, wastewater signals in some jurisdictions, and syndromic indicators. Reporting delays and testing capacity constraints can skew short-term trends. Virus Tracker normalizes heterogeneous sources and surfaces source confidence so readers can weigh freshness and coverage. Cross-checking with WHO, CDC, ECDC, or national dashboards remains essential for policy-grade decisions.
Key metrics
Active cases (dataset)
137,222,712
Reported deaths
15,284,086
Pressure index
214.37%
COVID-19 — global infection heat map
Country shading reflects relative active-case intensity from the current Virus Tracker dataset for this pathogen. Hover countries on desktop for counts.
Trajectory outlook
Trajectory (14d)
Regional analysis
Top regions by active cases
Top 10 tracked locations for COVID-19 by active cases in the current dataset.
Threat intelligence visuals
Threat Matrix
Pressure (x) vs CFR (y) with bubble size by active cases
Source Reliability
Healthy sources
4
Unhealthy sources
3
Average confidence
94.0%
Confidence exposure
130,359,095
Health ratio
Severity by Region
Top affected regions
| Location | Active | Deaths |
|---|---|---|
| India (IN) | 44,501,823 | 533,570 |
| Japan (JP) | 33,728,878 | 74,694 |
| Turkey (TR) | 17,129,892 | 102,174 |
| Iran (IR) | 7,480,375 | 146,811 |
| Poland (PL) | 6,541,393 | 120,598 |
| Greece (GR) | 6,063,510 | 37,869 |
| Bangladesh (BD) | 2,019,884 | 29,493 |
| Georgia (GE) | 1,844,533 | 17,132 |
| Brazil (BR) | 1,783,377 | 711,380 |
| Morocco (MA) | 1,262,689 | 16,303 |
| Costa Rica (CR) | 1,229,455 | 9,428 |
| Tunisia (TN) | 1,123,938 | 29,423 |
FAQ
Why do map colors differ between countries?
Colors reflect relative active-case intensity within the dataset shown for this virus, not an absolute clinical threshold. Sparse reporting can make a country appear cooler even when community burden exists.
Is this page medical advice?
Virus Tracker provides aggregated outbreak monitoring for education and situational awareness. It is not medical advice, a diagnostic service, or a substitute for guidance from qualified health professionals or official public health agencies. Always consult licensed clinicians and authoritative sources for personal health decisions.
What does the pressure index mean on Virus Tracker?
Pressure index reflects active-case burden relative to recoveries in our models. It helps compare stressed outbreak zones within the dataset—it is not a clinical score.
How often is this wiki updated?
Figures refresh on the site’s ingestion and revalidation schedule (typically about every 30 minutes in production). Timestamps on the dashboard snapshot indicate the last build of the underlying dataset.
Why might the heat map not match official government totals?
We merge multiple open sources and fallbacks; reporting lag, testing policy, and geographic coverage differ by country. Use national health ministries for authoritative case definitions.