HBV can survive in dried blood for at least how long?

HBV can survive in dried blood for at least how long?

• A. At least one day
• B. At least one week
• C. At least one month
• D. Indefinitely

Answer: (B)

HBV is surprisingly hardy in the environment, staying infectious in dried blood on surfaces for at least seven days. That means contaminated materials or surfaces can pose a risk long after the blood has dried, so rigorous cleaning and disinfection are essential. Use an EPA-registered disinfectant that has an HBV claim and follow the label for the required contact time, along with standard precautions and proper disposal. Shorter timelines, like one day, don’t reflect how long HBV can remain infectious, and options claiming a month or indefinite persistence aren’t supported by typical guidelines.

HBV is surprisingly hardy in the environment, staying infectious in dried blood on surfaces for at least seven days. That means contaminated materials or surfaces can pose a risk long after the blood has dried, so rigorous cleaning and disinfection are essential. Use an EPA-registered disinfectant that has an HBV claim and follow the label for the required contact time, along with standard precautions and proper disposal. Shorter timelines, like one day, don’t reflect how long HBV can remain infectious, and options claiming a month or indefinite persistence aren’t supported by typical guidelines.