```xml
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ns4:query_definition xmlns:ns2="http://www.i2b2.org/xsd/cell/crc/psm/1.1/" xmlns:ns4="http://www.i2b2.org/xsd/cell/crc/psm/querydefinition/1.1/" xmlns:ns3="http://www.i2b2.org/xsd/cell/crc/psm/analysisdefinition/1.1/">
    <query_name>Antiviral agent@19:00:16</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>3</hlevel>
            <item_name>Antiviral agents</item_name>
            <item_key>\\i2b2_MEDS\i2b2\Medications\MUL\(LME10) anti-infectives\(LME27) antiviral agents\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>medications \ anti-infectives \ antiviral agents</tooltip>
            <class>ENC</class>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
</ns4:query_definition>

```

I want to find all instances where the patient has been prescribed or administered antiviral agents within the medications section of their medical record, regardless of the specific time frame. This query will have a high level of accuracy and will include all medications classified under the antiviral agents category.