TechNet-21 - Forum

This forum provides a place for members to ask questions, share experiences, coordinate activities, and discuss recent developments in immunization.
  1. Nicholas Murphy
  2. Vaccines and delivery technologies
  3. Thursday, 06 August 2020

Hello everyone,

I'm a design engineering student working on designing and producing a new powered vaccine carrier, and I was hoping to get some information and feedback from those of you who are out in the field providing immunisations and delivering vaccines to remote communities. 

I'm also hoping for some general statistic information (such as average journey lengths/times, common issues, how many units you can transport per trip, etc), but any and all information is greatly appreciated.

I'm happy to discuss design details with anyone interested.

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Hello,
In Bangladesh we have a number of outreach sites where the VC leaves the Storage point around 6 am  and is returned back to the same storage point  around 6 pm. 
 
Health Workers prefer sturdy, lightweight VC with  replaceable straps ,as they carry the VCs  on their bicycle. Straps tend to get spoiled frequently. A longer Cold Life is always preferred.
Thank you
M.Hamidul Islam
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SAUMENDRA BAGCHI Accepted Answer

Hi Nicholus,

Good morning from India. Thanks for showing interest on VC which is the last mile delivery platform and mejority of vaccine damage ( both cold and heat are due to vaccine career and frozen/ loose icepack. In India in an average cold chain point in Rural 12-15 VC are being send to outreached vaccination centre and avarage time taken is 30-45 minutes in 2 Wheeler. The VC return back to cold chain point at around 1 PM with avarage time out side cold chain point is in between 8 AM to 1 PM. In Urban India the period is almost same.

It means The VC should be designed in such a way that it become very light weight to carry on sholder strap ( current weight with vaccine and ice pack ) is about 2-3 KG -difficult to carry on foot 

There is no provision for monitor the temp inside the VC with external windows for visibility. So VC should be designed with built in thrarmometer with accouracy

Although Health workers ( HW) was trained for conditioning of ice pack, but in practise it is not following, so there should be a layer between frozen ice packs and vaccine in pouch with no direct contact 

Another issue of volume capacity. Currently due to introduction of so many vaccines the volume capacity is inadequate ( approx 25 vials of vaccine + diluents) , so it need to be augmented to atleast 40-50 in large VC and 25-30 in small VC 

The current materials used is Polypropylene which itself has own weight. We can think of using other tough metal box yet very light weight.

Inside the VC there is always possibility of melting ice water which damage the vaccines and diluents. So there should be a mechanism of drainage of water 

feel free to contact with me for any update - Dr Saumendra Bagchi ( [email protected])

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