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 |
|---|---|
| 1880 | 1 |
| 1881 | 1 |
| 1882 | 1 |
| 1886 | 1 |
| 1887 | 1 |
| 1893 | 1 |
| 1894 | 1 |
| 1895 | 2 |
| 1896 | 1 |
| 1897 | 5 |
| 1898 | 2 |
| 1899 | 2 |
| 1900 | 1 |
| 1901 | 1 |
| 1902 | 2 |
| 1903 | 1 |
| 1904 | 2 |
| 1905 | 4 |
| 1906 | 1 |
| 1907 | 1 |
| 1908 | 2 |
| 1909 | 2 |
| 1910 | 1 |
| 1911 | 1 |
| 1912 | 4 |
| 1913 | 2 |
| 1914 | 3 |
| 1916 | 5 |
| 1917 | 1 |
| 1925 | 3 |
| 1926 | 4 |
| 1927 | 1 |
| 1928 | 1 |
| 1930 | 5 |
| 1933 | 7 |
| 1934 | 2 |
| 1936 | 2 |
| 1937 | 4 |
| 1938 | 1 |
| 1939 | 1 |
| 1941 | 2 |
| 1942 | 2 |
| 1945 | 3 |
| 1946 | 9 |
| 1947 | 18 |
| 1948 | 15 |
| 1949 | 10 |
| 1950 | 15 |
| 1951 | 19 |
| 1952 | 35 |
| 1953 | 35 |
| 1954 | 24 |
| 1955 | 23 |
| 1956 | 24 |
| 1957 | 37 |
| 1958 | 26 |
| 1959 | 25 |
| 1960 | 49 |
| 1961 | 46 |
| 1962 | 35 |
| 1963 | 50 |
| 1964 | 58 |
| 1965 | 46 |
| 1966 | 47 |
| 1967 | 79 |
| 1968 | 82 |
| 1969 | 84 |
| 1970 | 93 |
| 1971 | 99 |
| 1972 | 80 |
| 1973 | 93 |
| 1974 | 87 |
| 1975 | 99 |
| 1976 | 92 |
| 1977 | 118 |
| 1978 | 107 |
| 1979 | 113 |
| 1980 | 88 |
| 1981 | 116 |
| 1982 | 106 |
| 1983 | 98 |
| 1984 | 96 |
| 1985 | 129 |
| 1986 | 121 |
| 1987 | 108 |
| 1988 | 123 |
| 1989 | 155 |
| 1990 | 158 |
| 1991 | 164 |
| 1992 | 154 |
| 1993 | 172 |
| 1994 | 160 |
| 1995 | 166 |
| 1996 | 167 |
| 1997 | 159 |
| 1998 | 187 |
| 1999 | 205 |
| 2000 | 237 |
| 2001 | 269 |
| 2002 | 222 |
| 2003 | 213 |
| 2004 | 272 |
| 2005 | 259 |
| 2006 | 269 |
| 2007 | 298 |
| 2008 | 334 |
| 2009 | 334 |
| 2010 | 347 |
| 2011 | 400 |
| 2012 | 418 |
| 2013 | 409 |
| 2014 | 439 |
| 2015 | 440 |
| 2016 | 439 |
| 2017 | 522 |
| 2018 | 499 |
| 2019 | 455 |
| 2020 | 519 |
| 2021 | 109 |