```xml
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ns3:query_definition xmlns:ns2="http://www.i2b2.org/xsd/cell/crc/psm/1.1/" xmlns:ns4="http://www.i2b2.org/xsd/cell/crc/psm/analysisdefinition/1.1/" xmlns:ns3="http://www.i2b2.org/xsd/cell/crc/psm/querydefinition/1.1/">
    <query_name>Influenza virus@15:49:28</query_name>
    <query_timing>ANY</query_timing>
    <specificity_scale>0</specificity_scale>
    <panel>
        <panel_number>1</panel_number>
        <panel_timing>ANY</panel_timing>
        <panel_accuracy_scale>100</panel_accuracy_scale>
        <invert>0</invert>
        <total_item_occurrences>1</total_item_occurrences>
        <item>
            <hlevel>4</hlevel>
            <item_name>Influenza virus vaccine</item_name>
            <item_key>\\i2b2_MEDS\i2b2\Medications\MUL\(LME169) immunologic agents\(LME177) viral vaccines\influenza virus vaccine\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>medications \ immunologic agents \ viral vaccines \ influenza virus vaccine</tooltip>
            <class>ENC</class>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
</ns3:query_definition>

```

I want to find all instances of the mention of "Influenza virus vaccine" in the patient's medical record, regardless of the timing of the occurrence, with a specificity scale of 0 and accuracy scale of 100, focusing on the fourth hierarchical level of the concept "Influenza virus vaccine" within the "medications" category, specifically under "immunologic agents" and "viral vaccines" subcategories. The query will be named "Influenza virus@15:49:28".