In developing countries you have many asymptomatic carriers of cholera to spread the same. In developed countries, undercooked sea food is usually the source of cholera.
Cholera is not eradicated from the India. It is not possible to eradicate the cholera from India, in near future. Cholera is maintained in the community with many subclinical cases. Some of the people develop the severe form of cholera. With the majority people living in the villages and slums, they do not have access to good medical care. So many people die of dehydration, in isolated incidences.
Yes, cholera can be transmitted from country to country through contaminated food or water. In areas where sanitation and hygiene practices are poor, the risk of cholera spreading between countries is higher. Preventive measures such as clean water sources, proper sanitation, and vaccination can help control the spread of cholera.
In cholera vaccination you are injected the dead cells of cholera. So you get antibodies to cholera. This vaccine is not very effective. The protection rate is some where 50 to 60 % only. So you can not keep faith on the vaccine for protection from cholera.
Chlorine does not cause cholera. You may get cholera, by absence of that little chlorine in public water supply.
Cholera can not cause pandemic today, unless there is some natural calamity. There were cholera pandemic in past, due to lack of knowledge about cholera and lack of hygiene.
John Snow primarily uses detailed case studies and maps to show the correlation between contaminated water sources and cholera outbreaks, suggesting that the disease spreads through water contaminated with fecal matter. This technique helps him support his claim that cholera is transmitted person to person through contaminated water sources.
The most convenient cure for cholera is preventing it from occurring in the first place. If a person is infected, the cure for cholera involves treatment with fluid replacement and possibly antibiotics. If treatments for cholera are started in a timely manner and in adequate volumes, a cure for cholera is possible in greater than 99% of cases.
cholera
It was believed that, yes. Scientists thought cholera was also spread by air. Recently some scientific studies had proven that no... Cholera is only spread by food and water.
Secondary sources are better because your not learning the truth you have some story behind it and possible reasons that came to be.
Secondary sources are better because your not learning the truth you have some story behind it and possible reasons that came to be.
Doctors at the time had many theories of how cholera spread, some thought that cholera was spread by filth and stagnant water whereas others thought that cholera was transmitted by touch or someone's clothes.