The Centers for Disease Control and Prevention (CDC) has determined that an altered version of the JunÃn virus vaccine strain Candid No. 1 is now a select agent due to its increased virulence. Originally excluded from regulations because it was considered safe, the strain has since shown enhancements in its virulence due to specific genetic mutations. As a result, it is now subject to strict regulations to ensure public safety. This decision is in line with federal guidelines to manage biological agents that could pose severe threats to health and safety.
Simple Explanation
The government found that a special type of weakened virus, called the JunÃn virus vaccine, has changed a bit and could now be more dangerous, so they decided to be extra careful with it to keep people safe.