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<img src="path to image" class="description" alt="Rounded Image">
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<img src="..." class="img-fluid" style="max-width: 100%; height: auto;">
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$thumbnail-padding: .25rem;
$thumbnail-bg: $body-bg;
$thumbnail-border-width: $border-width;
$thumbnail-border-color: var(--#{$prefix}border-color);
$thumbnail-border-radius: $border-radius;
$thumbnail-box-shadow: $box-shadow-sm;
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<img src="https://chart.googleapis.com/chart?cht=qr&chl=https://covid.aminhospital.net/ValidateResult/validate/32853&chs=160x160&chld=L|0" class="qr-code img-thumbnail img-responsive" width="120" height="120">