Definition: In this task, you're given a paragraph from the research paper and your task is to generate a suitable title for the research paper based on the given paper. Under 100 words is a good title length.
Input: Background-Recently, several new human coronaviruses have been identified. Study design-A recombinant protein enzyme linked immunosorbent assay (ELISA) based on portions of the nucleocapsid protein of group I human coronaviruses was developed and was used to screen serum from 243 children and young adults. HCoV-229E, the percentages of seropositive individuals were 57.1% for infants < 2 months old; 38.9% for infants 2-3 months old; 4.7% for infants 4-5 months old; 42.9-50.0% for infants 6-12 months old; and 34.8-62.5% for individuals 1-20 years old. For HCoV-NL63, the percentages of seropositive individuals were 45.2% for infants < 2 months old; 11.1% for infants 2-3 months old; 4.7% for infants 4-5 months old; 28.6-40.0% for infants 6-12 months old; and 25.0-70.3% for individuals 1-20 years old. Conclusions-Infection with these viruses is common in childhood though the prevalence of these viruses may vary from year to year.

Seroepidemiology of group I human coronaviruses in children