Task: Answer Verification
Input (English): Question: Are human bocavirus infections common in Beijing population indicated by sero-antibody prevalence analysis?
Answer: The data suggest that HBoV has been circulating in Beijing population for at least over 10 years, and most of children had been exposed to HBoV by age of 7 years. Higher HBoV antibody positive rate shown in the serum specimens collected in 2005 suggested that infections by HBoV have been increased in Beijing population in recent years.
Output (English): yes