Table 7.
Items and frequency of hot keywords during 2012–2018.
| Item | Frequency | Year |
|---|---|---|
| CHINA | 10 | 2012 |
| RESPIRATORY | 8 | 2012 |
| MOLECULAR EPIDEMIOLOGY | 8 | 2012 |
| EPITOPE | 7 | 2012 |
| MOUSE HEPATITIS VIRUS | 6 | 2012 |
| ENCEPHALOMYELITIS | 6 | 2012 |
| SPIKE GLYCOPROTEIN | 6 | 2012 |
| PATHOGENICITY | 6 | 2012 |
| SARS | 60 | 2013 |
| SPIKE PROTEIN | 36 | 2013 |
| PHYLOGENETIC ANALYSIS | 34 | 2013 |
| FELINE CORONAVIRUS | 29 | 2013 |
| RESPIRATORY VIRUS | 26 | 2013 |
| CORONAVIRUS | 252 | 2014 |
| MERS-COV | 96 | 2014 |
| INFECTIOUS BRONCHITIS VIRUS | 65 | 2014 |
| EPIDEMIOLOGY | 44 | 2014 |
| MERS | 33 | 2015 |
| ANTIVIRAL | 12 | 2015 |
| RECOMBINATION | 9 | 2015 |
| RSV | 8 | 2015 |
| BETACORONAVIRUS | 8 | 2015 |