How many doses of IPV should David receive at his upcoming visit?

David should receive one dose of inactivated poliovirus vaccine (IPV) at his upcoming visit because IPV is typically administered as part of a routine childhood immunization schedule. According to the Centers for Disease Control and Prevention (CDC) guidelines, a complete series of IPV includes four doses given at ages 2 months, 4 months, 6-18 months, and 4-6 years.

If David is due for his first dose, he would receive just one dose at this visit marking the start of his vaccination series. The need for additional doses would depend on his previous vaccination history and the specific timing of his immunizations. If this is his initial vaccination or if it falls within the appropriate time frame for the next scheduled dose in the series, then a single dose is correct for that occasion.

Further context may include that other options suggest more doses that may not align with David's current immunization needs at this specific visit, particularly if he has not yet received IPV previously. Therefore, for the visit in question, getting one dose meets the criteria based on the routine vaccination schedule.