- Source: CNN " data-fave-thumbnails="{"big": { "uri": "https://media.cnn.com/api/v1/images/stellar/prod/200228092819-coronavirus-0228-japan-01.jpg?q=x_3,y_128,h_1386,w_2463,c_crop/h_540,w_960" }, "small": { "uri": "https://media.cnn.com/api/v1/images/stellar/prod/200228092819-coronavirus-0228-japan-01.jpg?q=x_3,y_128,h_1386,w_2463,c_crop/h_540,w_960" } }" data-vr-video="false" data-show-html=" Ne
![Japan’s coronavirus infection rate could be ‘tip of the iceberg’ as experts call for more testing | CNN](https://cdn-ak-scissors.b.st-hatena.com/image/square/f30b9c75a23ddaab13de720a4f9ac6f85b815b67/height=288;version=1;width=512/https%3A%2F%2Fmedia.cnn.com%2Fapi%2Fv1%2Fimages%2Fstellar%2Fprod%2F200303041657-01-coronavirus-tokyo-japan-0303.jpg%3Fq%3Dx_0%2Cy_156%2Ch_1688%2Cw_3000%2Cc_crop%2Fw_800)