COVID-19 is an emerging, rapidly evolving situation.
Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1799 | 1 |
| 1814 | 3 |
| 1823 | 1 |
| 1826 | 1 |
| 1830 | 1 |
| 1831 | 1 |
| 1832 | 1 |
| 1843 | 1 |
| 1845 | 2 |
| 1846 | 2 |
| 1847 | 1 |
| 1856 | 1 |
| 1860 | 1 |
| 1864 | 1 |
| 1865 | 1 |
| 1867 | 1 |
| 1873 | 2 |
| 1874 | 3 |
| 1879 | 1 |
| 1881 | 1 |
| 1886 | 2 |
| 1887 | 2 |
| 1888 | 1 |
| 1890 | 1 |
| 1892 | 1 |
| 1893 | 1 |
| 1894 | 2 |
| 1895 | 1 |
| 1896 | 2 |
| 1897 | 3 |
| 1898 | 3 |
| 1899 | 1 |
| 1900 | 2 |
| 1901 | 2 |
| 1903 | 1 |
| 1905 | 1 |
| 1906 | 2 |
| 1908 | 3 |
| 1909 | 1 |
| 1910 | 1 |
| 1913 | 1 |
| 1914 | 2 |
| 1915 | 1 |
| 1916 | 1 |
| 1917 | 2 |
| 1918 | 1 |
| 1919 | 1 |
| 1921 | 1 |
| 1924 | 1 |
| 1929 | 1 |
| 1930 | 1 |
| 1940 | 1 |
| 1946 | 1 |
| 1948 | 4 |
| 1949 | 2 |
| 1950 | 5 |
| 1951 | 6 |
| 1952 | 1 |
| 1953 | 2 |
| 1954 | 2 |
| 1955 | 1 |
| 1956 | 9 |
| 1957 | 16 |
| 1958 | 12 |
| 1959 | 14 |
| 1960 | 14 |
| 1961 | 8 |
| 1962 | 4 |
| 1963 | 8 |
| 1964 | 17 |
| 1965 | 32 |
| 1966 | 20 |
| 1967 | 10 |
| 1968 | 9 |
| 1969 | 3 |
| 1970 | 2 |
| 1971 | 2 |
| 1972 | 5 |
| 1973 | 4 |
| 1974 | 9 |
| 1975 | 26 |
| 1976 | 35 |
| 1977 | 39 |
| 1978 | 23 |
| 1979 | 28 |
| 1980 | 38 |
| 1981 | 25 |
| 1982 | 26 |
| 1983 | 49 |
| 1984 | 32 |
| 1985 | 31 |
| 1986 | 34 |
| 1987 | 36 |
| 1988 | 40 |
| 1989 | 75 |
| 1990 | 56 |
| 1991 | 55 |
| 1992 | 64 |
| 1993 | 71 |
| 1994 | 67 |
| 1995 | 75 |
| 1996 | 79 |
| 1997 | 92 |
| 1998 | 78 |
| 1999 | 76 |
| 2000 | 97 |
| 2001 | 112 |
| 2002 | 114 |
| 2003 | 132 |
| 2004 | 169 |
| 2005 | 194 |
| 2006 | 197 |
| 2007 | 221 |
| 2008 | 254 |
| 2009 | 285 |
| 2010 | 304 |
| 2011 | 320 |
| 2012 | 356 |
| 2013 | 412 |
| 2014 | 435 |
| 2015 | 495 |
| 2016 | 520 |
| 2017 | 533 |
| 2018 | 641 |
| 2019 | 790 |
| 2020 | 1006 |
| 2021 | 217 |