In fact, researchers in the United States (Polgreen et al. 2008; Ginsberg et al. 2009) and Sweden (Hulth, Rydevik, and Linde 2009) have found that certain search terms (e.g., "flu") predicted national public health surveillance data before it was released.
ໃນຄວາມເປັນຈິງ, ນັກຄົ້ນຄວ້າໃນສະຫະລັດອາເມລິກາ (Polgreen et al. 2008; Ginsberg et al. 2009) ແລະສວີເດນ (Hulth, Rydevik, and Linde 2009) ໄດ້ຄົ້ນພົບວ່າຄໍາຄົ້ນຫາບາງຢ່າງ (ເຊັ່ນ "ໄຂ້ຫວັດໃຫຍ່") ຂໍ້ມູນກ່ອນທີ່ມັນຈະຖືກປ່ອຍອອກມາ.