.left {
  width: 40%;
  height: 140%;
  position: fixed;
  right: 0;
  top: 0;
  background: grey;
  border-top-left-radius: 50%;
  border-bottom-left-radius: 50%;
  margin-top: -10%;
  background-image: url("/imagen-app-imedical.jpg");
  background-repeat: no-repeat;
  background-size: 100vh;
}