JFHMS Quality Assurance Practice Exam

How long should Modified live (MLV) and Chemically altered (CA) vaccines be disposed of after preparation?

1. 30 minutes

2. 1 hour

3. 2 hours

4. 4 hours

The correct answer is: 1 hour

The appropriate timeframe for disposing of Modified Live (MLV) and Chemically Altered (CA) vaccines after preparation is crucial for ensuring their effectiveness and safety. Once these types of vaccines are prepared, they are typically sensitive to environmental factors such as temperature and light, which can lead to a decrease in their potency over time. The established standard of 1 hour reflects the need to balance the operational efficiency of using the vaccine while minimizing the risk of administering a product that may have degraded. In this timeframe, the vaccine can be utilized effectively to ensure that the maximum number of animals receive their immunization while upholding safety protocols. Choosing a different duration, such as 30 minutes, 2 hours, or 4 hours, could risk either wasting the prepared vaccine too quickly without allowing enough time for use, or alternatively administering a vaccine that may no longer be effective if it is kept too long post-preparation. Therefore, adhering to the 1-hour limit aligns with best practices in veterinary medicine and vaccination protocols.