d19_vaccine</span><span class="op">)</span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span>         date country_region continent_name continent_code combined_key</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 1 2020-12-29        Austria         Europe             EU      Austria</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 2 2020-12-29        Bahrain           Asia             AS      Bahrain</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 3 2020-