What are the stages of a pandemic?
First stage- imported cases:
- In the first stage of a disease that eventually takes the form of a pandemic sweeping the globe, cases are imported into a country in which the infection did not originate.
- The first case of Covid-19 outside China was reported in Thailand.
Second stage- local transmission
- The second stage is when the virus starts being transmitted locally.
- Local transmission means that the source of the infection is from within a particular area and the trajectory the virus has taken from one person to the next is clearly established.
Third stage- Community transmission
- The third stage is that of community transmission where the source of the contagion is not known.
Fourth stage- disease becoming endemic
- Fourth stage in every pandemic is when the disease becomes endemic in some countries.
- Among diseases that are currently endemic in India,meaning they occur round the year across the country are malaria and dengue.
|About community transmission:
What does it imply?
Why in the news?
- The government has so far maintained that there is no community transmission in case of COVID-19 in the country.
- Some experts, however, have disagreed with this assertion for months, and said that community transmission of coronavirus is already taking place, and is not getting detected because India is not testing enough people.
News in detail:
- A joint statement by Indian Public Health Association, Indian Association of Preventive and Social Medicine and Indian Association of Epidemiologists says that as community transmission is already well-established across large sections or sub-populations in the country, it is unrealistic to expect that COVID-19 pandemic can be eliminated at this stage.