JSFiddle - React, Tailwind, and code Playground

HTML

<table id="tabela-1">
    <tr>
        <th>Nome</th>
        <th>Peso(kg)</th>
        <th>Altura(m)</th>
        <th>IMC</th>
    </tr>
    <tr class="paciente">
        <td class="info-nome" id="nome-1">Leonardo</td>
        <td class="info-peso" id="peso-1">57</td>
        <td class="info-altura" id="altura-1">1.67</td>
        <td class="info-imc" id="imc-1"></td>
        <td>
            <input type="button" class="btnadd" value="+" />
        </td>
        <td>
            <input type="button" class="btnremove" value="-" />
        </td>
    </tr>
    <tr class="paciente">
        <td class="info-nome" id="nome-2">Paulo</td>
        <td class="info-peso" id="peso-2">100</td>
        <td class="info-altura" id="altura-2">2.00</td>
        <td class="info-imc" id="imc-2"></td>
        <td>
            <input type="button" class="btnadd" value="+" />
        </td>
        <td>
            <input type="button" class="btnremove" value="-" />
        </td>
    </tr>
    <tr class="paciente">
        <td class="info-nome" id="nome-2">Paulo</td>
        <td class="info-peso" id="peso-2">100</td>
        <td class="info-altura" id="altura-2">2.00</td>
        <td class="info-imc" id="imc-2"></td>
        <td>
            <input type="button" class="btnadd" value="+" />
        </td>
        <td>
            <input type="button" class="btnremove" value="-" />
        </td>
    </tr>
    <tr class="paciente">
        <td class="info-nome" id="nome-2">Paulo</td>
        <td class="info-peso" id="peso-2">100</td>
        <td class="info-altura" id="altura-2">2.00</td>
        <td class="info-imc" id="imc-2"></td>
        <td>
            <input type="button" class="btnadd" value="+" />
        </td>
        <td>
            <input type="button" class="btnremove" value="-" />
        </td>
    </tr>
</table>

CSS

.btnadd {
    width: 30px;
    height: 30px;
}

JavaScript

document.getElementById('tabela-1').addEventListener('click', function (e) {
    var btn = e.target.type == 'button' && e.target;
    if (!btn) return;
    if (btn.classList.contains('btnadd')) {
        var tr = paiTr(btn).cloneNode(true);
        this.appendChild(tr);
    } else {
        console.log(this)
        var tr = paiTr(btn);
        tr.parentNode.removeChild(tr);
    }
});

function paiTr(el) {
    var tr = el;
    while (tr.tagName.toLowerCase() != 'tr') tr = tr.parentNode;
    return tr;
}