      <td>pathogens</td>
      <td>chronic</td>
      <td>hbov1</td>
      <td>human coronaviruses</td>
    </tr>
    <tr>
      <th>6</th>
      <td>study</td>
      <td>human</td>
      <td>unit</td>
      <td>HRV-C</td>
      <td>seasonal</td>
      <td>J.</td>
      <td>PCR</td>
      <td>H1N1</td>
      <td>metapneumovirus</td>
      <td>ratio</td>
      <td>kipyv</td>
      <td>mycoplasma</td>
      <td>RV</td>
      <td>rtis</td>
      <td>HKU1</td>
    </tr>
    <tr>
      <th>7</th>
      <td>infec