Other impacts associated with inadequate sanitation include an estimated 260 million people infected with schistosomiasis, a potentially fatal parasitic infection spread through contact with contaminated water.
"Scientists do not know to what extent flu viruses spread through the air or whether infection requires physical contact with contaminated fluids or surfaces, " a summary of the report says.
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The virus can be transmitted through the air from respiratory infection or by close contact between horses.
He is not supposed to get in any contact with infection whatsoever.
EHV-1 can be transmitted through the air from respiratory infection or by close contact between horses and although it can be treated, in some cases it can be fatal.
The infection can be transmitted through contact with an infected person or contaminated food and drink.
The HPA said the infection was often associated with contact with animals or contact with animal faeces.
"The most important goal remains to locate the source of infection so that measures to minimise contact can be taken", said Prof Ian Jones, Professor of Virology, University of Reading.
There was no sign of infection in anyone who had had close contact with him, said officials.
However, experts suspect that one child acquired the infection which was subsequently spread by direct contact from child to child.
The probability of actually catching the flu or a bacterial infection as a result of cell phone contact is actually dependent on a number of factors how long the viruses or bacteria have been on the phone surface.
The lead infection control nurse at the hospital, Emyr Phillips, told the inquest that the infection could only have been spread by direct contact.
The highly contagious virus can be spread by contact with contaminated surfaces or objects, contact with a person who has the infection or through contaminated food and water.
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Humans may catch the infection from eating undercooked meat from animals harbouring toxoplasma or from contact with cat litter or contaminated soil.
Although transmission of rhinovirus infection by way of surfaces is not as likely as transmission by direct contact with an infected person, it is important, say the researchers.
Limescale in hard water allows the growth of amoebae and the infection seems to be caused when wearers allow tap water to come into contact with their lenses when storing them or washing and showering.
Nineteen people who had close contact with the two new victims in Henan had shown no signs of infection, China's state news agency Xinhua said.
Experts say that cross-infection to humans is still relatively rare and usually occurs where people have been in close contact with infected birds.
Dr Dales said the last contact Mrs Taylor had with her surgery was on December 5 2011 regarding a prescription for antibiotics for an infection.
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