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- through media

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- High number of cases
- Case definition
1) Time ( point source, propagated)
2) Place - geographical spread, clusters
3) Person - Age, sex, occupation

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- Can be at any stage of investigation
- Behavioral : wearing long clothing and discarding stagnant waters

- Environmental measures : insecticide sprayed
- Infection control : protective equipment

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- Can be at any stage of investigation
- Behavioral : wearing long clothing and discarding stagnant waters

- Environmental measures : insecticide sprayed
- Infection control : protective equipment

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- Number of cases
- Possible factors contributing to the exposure risk of infection

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based on signs and symptoms
Symptoms begin 3–7 days after an infected mosquito bites

Common symptoms are fever and joint pain.

Other symptoms include headache, muscle pain, joint swelling, or rash

People at risk for more severe disease include newborns infected around the time of birth, older adults (≥65 years), and people with medical conditions such as high blood pressure, diabetes, or heart disease.

Based on geographical data
- areas with already outbreaks of chikungunya

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Laboratory results does not confirm
it as a case.

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Q: Does the outbreak cross out the factors to be included
and be investigated?

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through surveillance data

1. passive ; health jurisdiction will receive reports from public health

2. active ; employing staff members to regulate contact health care providers or population

3. sentinel ; independent clinical research obtain data about particular disease that cant be obtained through passive system thus they can summarise the standard public health reports

4. syndromic ; gathering information about patients symptoms