The open vial policy allows the use of certain vaccines in multiple sessions within a specified time period if the vial is handled under appropriate cold chain conditions. However, it does not apply to vaccines like BCG, as it is a freeze-dried (lyophilized) vaccine and must be discarded within 4–6 hours after reconstitution to prevent contamination and maintain efficacy.
Match Fibre with Application.\[\begin{array}{|l|l|} \hline \textbf{LIST I} & \textbf{LIST II} \\ \textbf{Fibre} & \textbf{Application} \\ \hline \hline \text{A. Silk fibre} & \text{I. Fire retardant} \\ \hline \text{B. Wool fibre} & \text{II. Directional lustre} \\ \hline \text{C. Nomex fibre} & \text{III. Bulletproof} \\ \hline \text{D. Kevlar fibre} & \text{IV. Thermal insulation} \\ \hline \end{array}\]