Press Esc to close
Monday 05 December 2016
News updated at 1:58 PM IST
Weather
Max: 26.9°C
Min : 18°C
In Bengaluru
Rain lightly

Preserving vaccines for world's poorest toddlers

New York, Dec 24, 2013 (IANS)
A child, left, watches a health worker administer polio vaccine to another child at a health center in Dhamua, outskirts of Kolkata, India. File photo AP.

We all know that vaccines need refrigeration to preserve their structure and immunogenicity. But in the case of children living in remote hinterland across the globe that get less or no electricity, this becomes a daunting task.

Half of the vaccines sent to developing countries are lost as they deteriorate during transportation.

The answer to preserve vaccines for such places lie in coating viruses or viral bits with silica in a hot-spring environment, says a new study published in The New York Times.

Scientists at Portland State University prevented several viruses from drying out by coating them with silica, used primarily in the production of glass for windows, just as they are coated in hot springs.

Once the silica coats were rinsed off, some of the viruses were able to infect cells again, said the NYT report.

"It's hard to put a fridge on the back of a donkey so we require such vaccines," Kenneth M. Stedman, lead author of the study, was quoted as saying.

Stedman and his team coated four types of virus with silica, stored them, then washed off the silica and tried to infect cells.

One heavily studied virus, phage T4, which infects the cells of E. coli bacteria, retained 90 percent of its infectivity while the virus used in smallpox vaccines also did well.

The team is now on the job to test the technique on flu virus and rotavirus, and later, polio. Next on the list is testing them in animals instead of cells.

Every year, nearly 22 million people in the world do not receive the necessary vaccines they need. One of the reasons is that vaccines must be kept at exactly the right temperature, between 2-8 degrees Celsius, or else their quality and effectiveness deteriorate.The study appeared in Journal of Virology.


Go to Top

Photo Gallery
South Indian actress Priyamani poses infront of a replica of Rome's Trevi Fountain...

South Indian actress Priyamani poses infront of a replica of Rome's Trevi Fountain...

People take part in boat rally in Yamuna river to spread awareness about 'Namami Gange Project...

People take part in boat rally in Yamuna river to spread awareness about 'Namami Gange Project...

Delegates of the 6th Ministerial Conference of the Heart of Asia-Istanbul Process...

Delegates of the 6th Ministerial Conference of the Heart of Asia-Istanbul Process...

Dog lovers participated at the 38th & 39th All Breed Championship Dog Shows, organized by...

Dog lovers participated at the 38th & 39th All Breed Championship Dog Shows, organized by...

People take out a rally to protest against Union Carbide and Dow Chemicals on the 32nd anniversary..

People take out a rally to protest against Union Carbide and Dow Chemicals on the 32nd anniversary..

Sitar player and composer Anoushka Shankar performs during a concert in Chennai...

Sitar player and composer Anoushka Shankar performs during a concert in Chennai...

Bollywood actor John Abraham during the launch of Nissan GT-R, in Mumbai...

Bollywood actor John Abraham during the launch of Nissan GT-R, in Mumbai...

The sunset in Kalaburgi on Friday...

The sunset in Kalaburgi on Friday...

Cricketer Yuvraj Singh and Hazel Keech during their marriage with Hindu rituals in Goa...

Cricketer Yuvraj Singh and Hazel Keech during their marriage with Hindu rituals in Goa...

Protesters throwing stones on police and CRPF amid tear smoke during a clash after Friday...

Protesters throwing stones on police and CRPF amid tear smoke during a clash after Friday...

Copyright 2014, The Printers (Mysore) Private Ltd., 75, M.G Road, Post Box 5331, Bengaluru - 560001
Tel: +91 (80) 25880000 Fax No. +91 (80) 25880523