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 |
|---|---|
| 1830 | 1 |
| 1845 | 1 |
| 1847 | 2 |
| 1848 | 1 |
| 1850 | 2 |
| 1851 | 1 |
| 1867 | 1 |
| 1877 | 1 |
| 1880 | 1 |
| 1885 | 1 |
| 1886 | 3 |
| 1887 | 1 |
| 1889 | 1 |
| 1890 | 1 |
| 1891 | 1 |
| 1894 | 3 |
| 1895 | 4 |
| 1896 | 1 |
| 1897 | 2 |
| 1898 | 2 |
| 1899 | 2 |
| 1900 | 6 |
| 1901 | 1 |
| 1902 | 1 |
| 1903 | 6 |
| 1904 | 7 |
| 1905 | 4 |
| 1907 | 3 |
| 1909 | 27 |
| 1910 | 32 |
| 1911 | 29 |
| 1912 | 21 |
| 1913 | 43 |
| 1914 | 27 |
| 1915 | 23 |
| 1916 | 20 |
| 1917 | 27 |
| 1918 | 28 |
| 1919 | 20 |
| 1920 | 28 |
| 1921 | 23 |
| 1922 | 25 |
| 1923 | 24 |
| 1924 | 23 |
| 1925 | 25 |
| 1926 | 28 |
| 1927 | 27 |
| 1928 | 29 |
| 1929 | 36 |
| 1930 | 40 |
| 1931 | 51 |
| 1932 | 54 |
| 1933 | 56 |
| 1934 | 49 |
| 1935 | 41 |
| 1936 | 51 |
| 1937 | 59 |
| 1938 | 37 |
| 1939 | 45 |
| 1940 | 24 |
| 1941 | 25 |
| 1942 | 21 |
| 1943 | 27 |
| 1944 | 18 |
| 1945 | 48 |
| 1946 | 184 |
| 1947 | 166 |
| 1948 | 131 |
| 1949 | 145 |
| 1950 | 210 |
| 1951 | 292 |
| 1952 | 339 |
| 1953 | 306 |
| 1954 | 275 |
| 1955 | 253 |
| 1956 | 224 |
| 1957 | 248 |
| 1958 | 256 |
| 1959 | 266 |
| 1960 | 212 |
| 1961 | 283 |
| 1962 | 313 |
| 1963 | 416 |
| 1964 | 563 |
| 1965 | 500 |
| 1966 | 441 |
| 1967 | 621 |
| 1968 | 880 |
| 1969 | 772 |
| 1970 | 843 |
| 1971 | 899 |
| 1972 | 931 |
| 1973 | 1782 |
| 1974 | 1917 |
| 1975 | 2207 |
| 1976 | 2216 |
| 1977 | 2617 |
| 1978 | 2830 |
| 1979 | 2721 |
| 1980 | 2741 |
| 1981 | 2589 |
| 1982 | 2606 |
| 1983 | 2912 |
| 1984 | 3108 |
| 1985 | 3297 |
| 1986 | 3451 |
| 1987 | 3798 |
| 1988 | 4371 |
| 1989 | 4967 |
| 1990 | 5383 |
| 1991 | 5996 |
| 1992 | 6456 |
| 1993 | 7069 |
| 1994 | 7241 |
| 1995 | 7135 |
| 1996 | 7550 |
| 1997 | 8103 |
| 1998 | 8335 |
| 1999 | 8607 |
| 2000 | 8973 |
| 2001 | 10012 |
| 2002 | 10198 |
| 2003 | 10739 |
| 2004 | 11063 |
| 2005 | 11615 |
| 2006 | 11378 |
| 2007 | 11294 |
| 2008 | 11627 |
| 2009 | 11664 |
| 2010 | 11939 |
| 2011 | 12306 |
| 2012 | 13238 |
| 2013 | 13916 |
| 2014 | 14105 |
| 2015 | 14757 |
| 2016 | 13999 |
| 2017 | 13942 |
| 2018 | 14319 |
| 2019 | 14235 |
| 2020 | 12907 |
| 2021 | 1716 |