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 |
|---|---|
| 1817 | 1 |
| 1826 | 1 |
| 1827 | 1 |
| 1828 | 1 |
| 1829 | 2 |
| 1831 | 5 |
| 1832 | 1 |
| 1835 | 3 |
| 1836 | 1 |
| 1838 | 1 |
| 1839 | 3 |
| 1840 | 1 |
| 1842 | 2 |
| 1843 | 1 |
| 1844 | 3 |
| 1845 | 1 |
| 1846 | 1 |
| 1847 | 1 |
| 1848 | 2 |
| 1849 | 3 |
| 1850 | 2 |
| 1851 | 3 |
| 1852 | 5 |
| 1853 | 3 |
| 1854 | 1 |
| 1855 | 1 |
| 1856 | 3 |
| 1857 | 2 |
| 1858 | 2 |
| 1859 | 2 |
| 1860 | 4 |
| 1861 | 6 |
| 1862 | 6 |
| 1863 | 6 |
| 1864 | 3 |
| 1865 | 6 |
| 1867 | 1 |
| 1868 | 3 |
| 1869 | 1 |
| 1870 | 1 |
| 1871 | 1 |
| 1874 | 3 |
| 1875 | 8 |
| 1876 | 2 |
| 1877 | 2 |
| 1878 | 1 |
| 1879 | 1 |
| 1882 | 1 |
| 1883 | 1 |
| 1884 | 1 |
| 1885 | 1 |
| 1886 | 2 |
| 1887 | 1 |
| 1888 | 1 |
| 1889 | 2 |
| 1893 | 4 |
| 1894 | 4 |
| 1895 | 5 |
| 1896 | 3 |
| 1897 | 5 |
| 1898 | 4 |
| 1899 | 4 |
| 1900 | 4 |
| 1901 | 3 |
| 1902 | 2 |
| 1903 | 2 |
| 1905 | 1 |
| 1906 | 1 |
| 1908 | 6 |
| 1909 | 2 |
| 1911 | 1 |
| 1912 | 1 |
| 1913 | 1 |
| 1914 | 1 |
| 1915 | 3 |
| 1916 | 5 |
| 1917 | 1 |
| 1918 | 1 |
| 1919 | 7 |
| 1920 | 3 |
| 1921 | 2 |
| 1922 | 2 |
| 1923 | 5 |
| 1924 | 8 |
| 1925 | 3 |
| 1926 | 4 |
| 1927 | 4 |
| 1928 | 4 |
| 1929 | 11 |
| 1930 | 4 |
| 1931 | 3 |
| 1932 | 2 |
| 1933 | 2 |
| 1934 | 13 |
| 1935 | 7 |
| 1936 | 6 |
| 1937 | 5 |
| 1938 | 1 |
| 1939 | 2 |
| 1940 | 7 |
| 1941 | 11 |
| 1942 | 6 |
| 1943 | 8 |
| 1944 | 17 |
| 1945 | 16 |
| 1946 | 52 |
| 1947 | 65 |
| 1948 | 59 |
| 1949 | 61 |
| 1950 | 60 |
| 1951 | 69 |
| 1952 | 66 |
| 1953 | 86 |
| 1954 | 85 |
| 1955 | 88 |
| 1956 | 89 |
| 1957 | 102 |
| 1958 | 110 |
| 1959 | 86 |
| 1960 | 133 |
| 1961 | 142 |
| 1962 | 260 |
| 1963 | 235 |
| 1964 | 228 |
| 1965 | 278 |
| 1966 | 290 |
| 1967 | 305 |
| 1968 | 332 |
| 1969 | 414 |
| 1970 | 455 |
| 1971 | 492 |
| 1972 | 602 |
| 1973 | 621 |
| 1974 | 686 |
| 1975 | 722 |
| 1976 | 858 |
| 1977 | 893 |
| 1978 | 909 |
| 1979 | 896 |
| 1980 | 1031 |
| 1981 | 1041 |
| 1982 | 1140 |
| 1983 | 1227 |
| 1984 | 1316 |
| 1985 | 1537 |
| 1986 | 1773 |
| 1987 | 1969 |
| 1988 | 2206 |
| 1989 | 2330 |
| 1990 | 2462 |
| 1991 | 2787 |
| 1992 | 2945 |
| 1993 | 3146 |
| 1994 | 3706 |
| 1995 | 4037 |
| 1996 | 4441 |
| 1997 | 4490 |
| 1998 | 5061 |
| 1999 | 5654 |
| 2000 | 6746 |
| 2001 | 7636 |
| 2002 | 8321 |
| 2003 | 9825 |
| 2004 | 11528 |
| 2005 | 13474 |
| 2006 | 15011 |
| 2007 | 16929 |
| 2008 | 19254 |
| 2009 | 21283 |
| 2010 | 24479 |
| 2011 | 27689 |
| 2012 | 30416 |
| 2013 | 32358 |
| 2014 | 34480 |
| 2015 | 36748 |
| 2016 | 37508 |
| 2017 | 37984 |
| 2018 | 38944 |
| 2019 | 40441 |
| 2020 | 46355 |
| 2021 | 10044 |