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 |
|---|---|
| 1781 | 1 |
| 1784 | 1 |
| 1792 | 1 |
| 1794 | 2 |
| 1797 | 2 |
| 1798 | 1 |
| 1799 | 1 |
| 1800 | 5 |
| 1801 | 2 |
| 1803 | 2 |
| 1804 | 2 |
| 1805 | 1 |
| 1807 | 1 |
| 1808 | 2 |
| 1809 | 1 |
| 1810 | 2 |
| 1811 | 4 |
| 1812 | 5 |
| 1813 | 5 |
| 1814 | 4 |
| 1815 | 1 |
| 1817 | 2 |
| 1818 | 4 |
| 1819 | 2 |
| 1820 | 1 |
| 1821 | 5 |
| 1822 | 3 |
| 1823 | 5 |
| 1824 | 1 |
| 1825 | 4 |
| 1826 | 5 |
| 1827 | 7 |
| 1828 | 6 |
| 1829 | 8 |
| 1830 | 9 |
| 1831 | 5 |
| 1832 | 1 |
| 1834 | 2 |
| 1836 | 3 |
| 1837 | 9 |
| 1838 | 3 |
| 1839 | 7 |
| 1840 | 6 |
| 1841 | 10 |
| 1842 | 13 |
| 1843 | 15 |
| 1844 | 5 |
| 1845 | 11 |
| 1846 | 8 |
| 1847 | 4 |
| 1848 | 9 |
| 1849 | 4 |
| 1850 | 4 |
| 1851 | 6 |
| 1852 | 2 |
| 1853 | 2 |
| 1854 | 4 |
| 1855 | 6 |
| 1856 | 13 |
| 1857 | 12 |
| 1858 | 10 |
| 1859 | 9 |
| 1860 | 12 |
| 1861 | 3 |
| 1862 | 8 |
| 1863 | 6 |
| 1864 | 7 |
| 1865 | 4 |
| 1866 | 9 |
| 1867 | 14 |
| 1868 | 30 |
| 1869 | 28 |
| 1870 | 31 |
| 1871 | 25 |
| 1872 | 31 |
| 1873 | 26 |
| 1874 | 21 |
| 1875 | 27 |
| 1876 | 14 |
| 1877 | 19 |
| 1878 | 16 |
| 1879 | 17 |
| 1880 | 10 |
| 1881 | 15 |
| 1882 | 24 |
| 1883 | 14 |
| 1884 | 21 |
| 1885 | 18 |
| 1886 | 11 |
| 1887 | 16 |
| 1888 | 13 |
| 1889 | 18 |
| 1890 | 24 |
| 1891 | 18 |
| 1892 | 30 |
| 1893 | 31 |
| 1894 | 16 |
| 1895 | 16 |
| 1896 | 22 |
| 1897 | 18 |
| 1898 | 19 |
| 1899 | 21 |
| 1900 | 20 |
| 1901 | 18 |
| 1902 | 19 |
| 1903 | 37 |
| 1904 | 16 |
| 1905 | 30 |
| 1906 | 18 |
| 1907 | 24 |
| 1908 | 21 |
| 1909 | 37 |
| 1910 | 41 |
| 1911 | 32 |
| 1912 | 32 |
| 1913 | 41 |
| 1914 | 37 |
| 1915 | 52 |
| 1916 | 41 |
| 1917 | 59 |
| 1918 | 40 |
| 1919 | 37 |
| 1920 | 41 |
| 1921 | 28 |
| 1922 | 28 |
| 1923 | 39 |
| 1924 | 57 |
| 1925 | 34 |
| 1926 | 44 |
| 1927 | 47 |
| 1928 | 58 |
| 1929 | 47 |
| 1930 | 39 |
| 1931 | 43 |
| 1932 | 55 |
| 1933 | 54 |
| 1934 | 56 |
| 1935 | 52 |
| 1936 | 75 |
| 1937 | 41 |
| 1938 | 44 |
| 1939 | 51 |
| 1940 | 47 |
| 1941 | 45 |
| 1942 | 54 |
| 1943 | 36 |
| 1944 | 75 |
| 1945 | 861 |
| 1946 | 2701 |
| 1947 | 2884 |
| 1948 | 3036 |
| 1949 | 2625 |
| 1950 | 3394 |
| 1951 | 4135 |
| 1952 | 4887 |
| 1953 | 5417 |
| 1954 | 5656 |
| 1955 | 6112 |
| 1956 | 5823 |
| 1957 | 6459 |
| 1958 | 6284 |
| 1959 | 6392 |
| 1960 | 7036 |
| 1961 | 7875 |
| 1962 | 8016 |
| 1963 | 13195 |
| 1964 | 20186 |
| 1965 | 18143 |
| 1966 | 18944 |
| 1967 | 22819 |
| 1968 | 26810 |
| 1969 | 28855 |
| 1970 | 30490 |
| 1971 | 33500 |
| 1972 | 36035 |
| 1973 | 38115 |
| 1974 | 39898 |
| 1975 | 41240 |
| 1976 | 40761 |
| 1977 | 41169 |
| 1978 | 42610 |
| 1979 | 45843 |
| 1980 | 46289 |
| 1981 | 47371 |
| 1982 | 50926 |
| 1983 | 54071 |
| 1984 | 58372 |
| 1985 | 60057 |
| 1986 | 62647 |
| 1987 | 64891 |
| 1988 | 69248 |
| 1989 | 75970 |
| 1990 | 80629 |
| 1991 | 81903 |
| 1992 | 83354 |
| 1993 | 86157 |
| 1994 | 89602 |
| 1995 | 91735 |
| 1996 | 93700 |
| 1997 | 94388 |
| 1998 | 98401 |
| 1999 | 103274 |
| 2000 | 111295 |
| 2001 | 121712 |
| 2002 | 126405 |
| 2003 | 133209 |
| 2004 | 141069 |
| 2005 | 154083 |
| 2006 | 163968 |
| 2007 | 175228 |
| 2008 | 182548 |
| 2009 | 188679 |
| 2010 | 203334 |
| 2011 | 217621 |
| 2012 | 230836 |
| 2013 | 240015 |
| 2014 | 248417 |
| 2015 | 254954 |
| 2016 | 259017 |
| 2017 | 261543 |
| 2018 | 269681 |
| 2019 | 275900 |
| 2020 | 238358 |
| 2021 | 47646 |