The inventory-to-sales ratio, a gauge of how long stockpiles stay on shelves at the current sales pace, was 1.37 months in March, figures from the Commerce Department showed today.
As evident from Table 3, in the case of long term stockpiling wastage of earlier stockpiles occurs given the short shelf-life of the vaccines, with the result being generally less cost-beneficial, unless costs are reduced to seasonal vaccine levels or the perception of severity is high.
Finally, these anti-AIV vectors could be generated in a scalable process for low-cost production, stockpiled for long-term use, and applied rapidly via mass aerosolization.
For long term stockpiling strategies with 1957 and 1968 pandemic case-fatality rates of 0.4 to 0.6%, stockpiling would be cost-beneficial only if the pandemic occurred within 10 years, the shelf-life was 5 years, and vaccine effectiveness was >80%.
The later was chosen as it had a 140-day half life, which made it intense enough to be useful but long-lived enough to be stockpiled.
The latter was chosen as it had a 140-day half life, which made it intense enough to be useful but not long-lived enough to be stockpiled.
That argument, though, is extremely long term: Stockpile reductions would manifest only after three decades of atomic revitalization, many presidencies from now.
The shift in the marketplace is quite evident when looking at the automotive industrys commonly used figure called days supply, which measures how long the stockpile of a particular model would last based on the selling rate over the previous month.
Before very long vast stockpiles of 'recovered' sulphur were building up on the plains of Alberta, Canada.
Even under the lower cost of USD$6.6, long term stockpiling strategies were cost-beneficial only with high vaccine effectiveness of >60% or high attack rates of >40%.
