Trước Covid-19 đã có những đại dịch nào áp dụng biện pháp cách ly xã hội?

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<html><body><blockquote>"...Nh&#7919;ng ph&iacute;m &#273;en tr&#7855;ng n&#7913;t ra, &#273;&#7913;t g&atilde;y, h&#7897;p &#273;&agrave;n b&#7853;t tung &#273;&#7875; l&#7897; nh&#7919;ng chi&#7871;c b&uacute;a g&#7895; nh&#7887; x&iacute;u m&#7887;ng manh, c&acirc;y &#273;&agrave;n &#273;&#7913;ng im ch&#7883;u tr&#7853;n, t&ocirc;i ng&#7841;t th&#7903;, t&ocirc;i ch&#7913;ng ki&#7871;n h&#7871;t, m&#432;a trong kh&oacute;e m&#7855;t d&#7847;n &#273;&#7847;y."</blockquote>T&ocirc;i t&#7915;ng nghe c&acirc;u chuy&#7879;n c&#7911;a m&#7897;t ng&#432;&#7901;i anh k&#7875; v&#7873; ng&#432;&#7901;i th&#7847;y d&#7841;y to&aacute;n c&#361; c&#7911;a anh &#7845;y. Hai m&#432;&#417;i n&#259;m tr&#432;&#7899;c th&#7847;y c&oacute; m&#7897;t c&ocirc;ng tr&igrave;nh nghi&ecirc;n c&#7913;u r&#7845;t hay v&#7873; ph&#432;&#417;ng tr&igrave;nh nghi&#7879;m nguy&ecirc;n, nh&#432;ng sau &#273;&oacute; v&igrave; ph&#7843;i d&#7841;y th&ecirc;m m&#432;u sinh, khi th&#7847;y nh&igrave;n l&#7841;i th&igrave; kh&ocirc;ng c&ograve;n nh&#7899; m&#7897;t c&aacute;i g&igrave; c&#7843;. Th&#7847;y n&oacute;i, nh&igrave;n t&acirc;m huy&#7871;t c&#7911;a m&igrave;nh hai m&#432;&#417;i n&#259;m tr&#432;&#7899;c m&agrave; kh&ocirc;ng hi&#7875;u m&#7897;t ch&#7919;, n&oacute; th&#7921;c s&#7921; r&#7845;t &#273;au l&ograve;ng.Ng&agrave;y h&ocirc;m qua khi t&ocirc;i ng&#7891;i xem ti vi c&ugrave;ng b&#7889;, b&#7889; b&#7843;o l&acirc;u r&#7891;i kh&ocirc;ng th&#7845;y con g&aacute;i ch&#417;i &#273;&agrave;n. Qu&#7843; th&#7921;c tr&#432;&#7899;c &#273;&acirc;y t&ocirc;i &#273;&atilde; t&#7915;ng ch&#417;i piano. C&oacute; m&#7897;t th&#7901;i gian, khi b&#7841;n b&egrave; h&#432;&#7903;ng &#7913;ng theo l&agrave;n s&oacute;ng Hallyu, h&#7885; xem "V&#432;&#7901;n sao b&#259;ng", th&igrave; t&#7845;t c&#7843; cu&#7897;c s&#7889;ng c&#7911;a t&ocirc;i ch&#7881; l&agrave; nh&#7919;ng kh&uacute;c t&#7853;p luy&#7879;n c&#7911;a Chopin, c&#7911;a Bethoveen, kh&uacute;c ch&egrave;o thuy&#7873;n th&aacute;ng s&aacute;u c&#7911;a Tchaikovsky, nh&#7919;ng Sonata, Nocturne, Prelude. Nh&#432;ng r&#7891;i t&ocirc;i l&#7921;a ch&#7885;n v&agrave;o m&#7897;t tr&#432;&#7901;ng &#273;&#7841;i h&#7885;c kinh t&#7871;, ch&#7881; hai n&#259;m sau &#273;&oacute; quay tr&#7903; v&#7873; nh&igrave;n l&#7841;i chi&#7871;c piano c&#361;, t&ocirc;i &#273;&atilde; ho&agrave;n to&agrave;n xa l&#7841;. Nh&#7919;ng ph&iacute;m &#273;en tr&#7855;ng, nh&#7919;ng b&#7843;n nh&#7841;c, nh&#7919;ng k&iacute; hi&#7879;u t&ocirc;i &#273;&atilde; t&#7915;ng r&#7845;t quen thu&#7897;c, b&acirc;y gi&#7901; ch&uacute;ng l&#7863;ng c&acirc;m nh&#432; &acirc;m giai c&#7911;a m&#7897;t d&#7845;u l&#7863;ng. M&#7895;i l&#7847;n nh&igrave;n l&#7841;i chi&#7871;c piano &#273;&oacute;, t&ocirc;i l&#7841;i th&#7845;y bu&#7891;n. T&ocirc;i c&#7843;m th&#7845;y nh&#432; m&igrave;nh &#273;&atilde; ph&#7909; l&ograve;ng n&oacute;.<figure class="image"><img src="/upload/files/tranh%202.jpg"><figcaption>Tranh m&agrave;u n&#432;&#7899;c c&#7911;a kelogsloops. Tranh c&#7911;a anh lu&ocirc;n c&oacute; s&#7921; tham gia c&#7911;a m&#7897;t t&ocirc;ng xanh r&#7845;t tr&#7847;m, t&ocirc;i v&#7915;a nghe Chopin v&#7915;a xem tranh c&#7911;a anh.</figcaption></figure>&nbsp;T&ocirc;i ch&#7889;ng ch&#7871; v&#7899;i b&#7889; r&#7857;ng, b&acirc;y gi&#7901; thay v&igrave; ch&#417;i piano th&igrave; con &#273;ang v&#7869; tranh. H&#7897;p m&agrave;u v&agrave; c&#7885; v&#7869; c&oacute; th&#7875; mang &#273;i b&#7845;t c&#7913; &#273;&acirc;u, nh&#432;ng piano th&igrave; l&agrave;m sao mang &#273;i &#273;&#432;&#7907;c. B&#7889; ch&#7881; h&#7887;i, nh&#432;ng con v&#7851;n nh&#7899; ch&#7913; &#273;&uacute;ng kh&ocirc;ng, nh&#7919;ng b&#7843;n nh&#7841;c &#273;&atilde; n&#7857;m trong &#273;&#7847;u con, b&acirc;y gi&#7901; con v&#7851;n nh&#7899; ch&#7913; &#273;&uacute;ng kh&ocirc;ng.T&ocirc;i im l&#7863;ng. Ch&#7859;ng bi&#7871;t ph&#7843;i tr&#7843; l&#7901;i th&#7871; n&agrave;o. T&ocirc;i tr&#7889;n tr&aacute;nh. Ch&#7859;ng l&#7869; l&#7841;i n&oacute;i r&#7857;ng con &#273;&atilde; &#273;i hai n&#259;m, v&agrave; con s&#7869; l&#7841;i &#273;i ti&#7871;p, con &#273;&atilde; qu&ecirc;n ph&iacute;m piano, v&agrave; con s&#7869; l&#7841;i qu&ecirc;n nh&#7919;ng b&#7843;n nh&#7841;c th&ocirc;i. Nh&#7919;ng b&#7843;n nh&#7841;c l&#7841;c trong &#273;&#7889;ng k&iacute; &#7913;c h&#7895;n &#273;&#7897;n, kh&ocirc;ng b&#7843;n n&agrave;o trong s&#7889; ch&uacute;ng n&#7843;y ra trong &#273;&#7847;u t&ocirc;i khi nh&igrave;n nh&#7919;ng ph&iacute;m &#273;&agrave;n. Ch&uacute;ng c&#432;&#7901;i nh&#7841;o, nh&#7919;ng b&#7843;n nh&#7841;c l&#7903;n v&#7903;n, nh&#7855;c t&ocirc;i nh&#7899; l&#7841;i nh&#7919;ng khi b&agrave;n tay l&#432;&#7899;t tr&ecirc;n ph&iacute;m. &#272;en tr&#7855;ng. Ch&uacute;ng kh&ocirc;ng t&ecirc;n. Chi&#7871;c piano &#273;ang im l&#7863;ng, nh&#432;ng t&ocirc;i bi&#7871;t n&oacute; &#273;ang kh&oacute;c.B&acirc;y gi&#7901; t&ocirc;i v&#7851;n nghe Chopin, nh&#432;ng c&#7843;m gi&aacute;c khi nghe v&agrave; c&#7843;m gi&aacute;c l&uacute;c t&#7853;p luy&#7879;n th&#7853;t s&#7921; kh&aacute;c l&#7855;m.&nbsp;T&ocirc;i c&#7843;m th&#7845;y t&ocirc;i gi&#7889;ng th&#7847;y gi&aacute;o c&#7911;a ng&#432;&#7901;i anh n&#7885;. Hai m&#432;&#417;i n&#259;m, hay th&#7853;m ch&iacute; ch&#7881; l&agrave; hai n&#259;m, t&#7915;ng &#273;&oacute; &#273;&#7911; &#273;&#7875; th&#7901;i gian mang nh&#7919;ng &#273;i&#7873;u ch&uacute;ng ta &#273;&atilde; t&#7915;ng r&#7845;t tr&acirc;n qu&yacute; &#273;i m&#7845;t. Gi&#7889;ng nh&#432; ng&ocirc;i nh&agrave; &#273;&atilde; t&#7915;ng &#7903; khi c&ograve;n b&eacute;, gi&#7889;ng nh&#432; khu ph&#7889; nh&#7919;ng n&#259;m 80s, t&#7915;ng ng&oacute;c ng&aacute;ch ch&uacute;ng ta &#273;&atilde; thu&#7897;c n&#7857;m l&ograve;ng, ch&uacute;ng ta ngh&#297;, ch&#7859;ng &#273;i&#7873;u g&igrave; c&oacute; th&#7875; mang nh&#7919;ng th&#7913; n&agrave;y &#273;i &#273;&#432;&#7907;c, v&igrave; n&oacute; &#273;&atilde; &#7903; trong tim ch&uacute;ng ta. R&#7891;i ta r&#7901;i &#273;i. Tr&#432;&#7899;c khi &#273;i l&#432;u luy&#7871;n nh&igrave;n l&#7841;i l&#7847;n cu&#7889;i t&#7915;ng &#273;&#7891; v&#7853;t, t&#7915; c&aacute;i qu&#7841;t r&#7881; s&eacute;t tr&ecirc;n b&agrave;n b&#7871;p, t&#7915; c&aacute;i gh&#7871; c&oacute; m&#7897;t ch&acirc;n b&#7883; h&#7887;ng, t&#432;&#7901;ng v&ocirc;i xanh loang l&#7893;, t&#7845;m r&egrave;m m&agrave;u huy&#7871;t d&#7909; hoa tr&#7855;ng xanh c&#361; m&egrave;m, mi&#7879;ng l&#7849;m nh&#7849;m ng&agrave;y g&#7863;p l&#7841;i. Nh&#432;ng ch&uacute;ng ta &#273;i, r&#7891;i th&#7901;i gian c&#361;ng mang nh&#7919;ng th&#7913; &#7845;y &#273;i m&#7845;t. Khi ta tr&#7903; v&#7873;, c&#259;n nh&agrave; tr&#7889;ng kh&ocirc;ng, c&#259;n ph&#7889; c&#361; th&igrave; &#273;&#432;&#7907;c x&acirc;y m&#7899;i. T&#7845;t c&#7843; thay &#273;&#7893;i r&#7891;i.Cu&#7897;c s&#7889;ng v&agrave; th&#7901;i gian xoay v&#7847;n, cu&#7889;n c&#7843; t&ocirc;i, c&#7843; th&#7847;y gi&aacute;o v&agrave;o trong l&ograve;ng ch&#7843;o kh&#7893;ng l&#7891; c&#7911;a n&oacute;. M&#7897;t l&ocirc; h&#7895;n &#273;&#7897;n nh&#7919;ng d&ograve;ng xo&aacute;y m&agrave;u b&#7841;c x&aacute;m, ch&uacute;ng xo&aacute;y m&#7841;nh v&agrave;o t&ocirc;i. N&oacute; nghi&#7871;n t&ocirc;i v&agrave;o trong khu&ocirc;n vi&ecirc;n tr&#432;&#7901;ng &#273;&#7841;i h&#7885;c, n&oacute; qu&#259;ng t&ocirc;i ra xa kh&#7887;i c&acirc;y &#273;&agrave;n, n&oacute; nh&#7845;n &#273;&#7847;u t&ocirc;i xu&#7889;ng nh&#7919;ng b&#7843;ng c&acirc;n &#273;&#7889;i k&#7871; to&aacute;n, nh&#7919;ng &#273;i&#7873;u lu&#7853;t, nh&#7919;ng gi&aacute; tr&#7883; c&#7911;a ph&#432;&#417;ng sai v&agrave; k&#7923; v&#7885;ng, n&#417;i t&ocirc;i ch&#7859;ng th&#7875; nghe th&#7845;y ti&#7871;ng &#273;&agrave;n, n&#417;i &#273;&ocirc;i m&#7855;t ch&#7859;ng t&igrave;m th&#7845;y hai s&#7855;c &#273;en tr&#7855;ng. T&#7915;ng nh&aacute;t b&uacute;a d&#7891;n d&#7853;p c&#7913; th&#7875; b&#7893; xu&#7889;ng, n&oacute; b&#7893; xu&#7889;ng &#273;&#7847;u t&ocirc;i, c&oacute; l&uacute;c n&oacute; b&#7893; v&agrave;o c&acirc;y &#273;&agrave;n. Nh&#7919;ng ph&iacute;m &#273;en tr&#7855;ng n&#7913;t ra, &#273;&#7913;t g&atilde;y, h&#7897;p &#273;&agrave;n b&#7853;t tung &#273;&#7875; l&#7897; nh&#7919;ng chi&#7871;c b&uacute;a g&#7895; nh&#7887; x&iacute;u m&#7887;ng manh, c&acirc;y &#273;&agrave;n &#273;&#7913;ng im ch&#7883;u tr&#7853;n, t&ocirc;i ng&#7841;t th&#7903;, t&ocirc;i ch&#7913;ng ki&#7871;n h&#7871;t, m&#432;a trong kh&oacute;e m&#7855;t d&#7847;n &#273;&#7847;y.<blockquote>"Nu&#7889;i ti&#7871;c l&agrave; h&#7909;t h&#7851;ng."</blockquote>T&#7845;t c&#7843; nh&#7919;ng n&#7895;i &#273;au &#273;&oacute;, t&#7845;t c&#7843; nh&#7919;ng m&#7845;t m&aacute;t v&ocirc; h&igrave;nh &#273;&oacute;, ch&uacute;ng t&oacute;m g&#7885;n l&#7841;i trong m&#7897;t tr&#7841;ng th&aacute;i c&#7911;a s&#7921; nh&#7853;n th&#7913;c. &#272;&oacute; l&agrave; nu&#7889;i ti&#7871;c. Nu&#7889;i ti&#7871;c c&oacute; m&agrave;u x&aacute;m, nu&#7889;i ti&#7871;c &#273;&#7909;c ng&#7847;u. Nh&#432;ng bi&#7871;t sao &#273;&#432;&#7907;c, qu&aacute; kh&#7913; &#273;&#7871;n v&agrave; &#273;i nh&#432; n&#432;&#7899;c ch&#7843;y qua k&#7869; tay, c&#7913; tr&ocirc;i, kh&ocirc;ng g&igrave; k&igrave;m l&#7841;i &#273;&#432;&#7907;c. Nh&#7919;ng g&igrave; c&ograve;n &#7903; l&#7841;i v&#7899;i ch&uacute;ng ta l&agrave; &#273;au bu&#7891;n, l&agrave; ho&agrave;i v&#7885;ng nh&#7919;ng &#273;i&#7873;u kh&ocirc;ng bao gi&#7901; l&#7845;y l&#7841;i &#273;&#432;&#7907;c. N&#7871;u nh&#432; ng&agrave;y &#273;&oacute; t&ocirc;i qu&#7843; quy&#7871;t th&ecirc;m m&#7897;t ch&uacute;t, chi&#7871;c piano c&oacute; l&#7869; &#273;&atilde; kh&ocirc;ng bu&#7891;n nh&#432; h&ocirc;m nay, b&#7843;n th&acirc;n t&ocirc;i c&#361;ng kh&ocirc;ng &aacute;y n&aacute;y nh&#432; th&#7871;?Th&#7921;c ra, t&ocirc;i bi&#7871;t, to&aacute;n c&oacute; th&#7875; h&#7885;c l&#7841;i, &#273;&agrave;n c&#361;ng c&oacute; th&#7875; h&#7885;c l&#7841;i. Ng&#7891;i &#273;&#7885;c l&#7841;i nh&#7919;ng trang ki&#7871;n th&#7913;c ng&agrave;y x&#432;a, ng&#7891;i nh&#7849;m l&#7841;i v&#7883; tr&iacute; t&#7915;ng n&#7889;t nh&#7841;c, ng&#7891;i nghi&#7873;m ng&#7851;m l&yacute; thuy&#7871;t, ng&#7891;i nh&#7845;n nh&#7919;ng ph&iacute;m &#273;&agrave;n. Ch&uacute;ng ta &#273;&#7873;u c&oacute; th&#7875; l&agrave;m &#273;&#432;&#7907;c, ch&uacute;ng ta &#273;&#7873;u c&oacute; th&#7875; l&agrave;m l&#7841;i t&#7915; &#273;&#7847;u. &#272;&oacute; l&agrave; m&#7897;t s&#7921; kh&#7903;i &#273;&#7847;u m&#7899;i. Nh&#432;ng c&#7843;m gi&aacute;c ng&agrave;y x&#432;a &#273;&atilde; kh&ocirc;ng th&#7875; l&#7845;y l&#7841;i &#273;&#432;&#7907;c n&#7919;a. M&#7885;i s&#7921; say m&ecirc;, nh&#7919;ng n&#7895;i ni&#7873;m ch&#7881; m&igrave;nh t&ocirc;i v&#7899;i chi&#7871;c piano bi&#7871;t, nh&#7919;ng &#273;&ecirc;m mi&#7879;t m&agrave;i b&ecirc;n ph&#432;&#417;ng tr&igrave;nh c&#7911;a th&#7847;y gi&aacute;o n&#7885;, t&#7921; nh&#7911; r&#7857;ng m&igrave;nh h&#7841;nh ph&uacute;c v&igrave; t&acirc;m huy&#7871;t c&#7911;a m&igrave;nh. T&#7845;t c&#7843; &#273;&atilde; tr&ocirc;i v&#7873; ph&iacute;a sau, &#273;&atilde; n&#7857;m l&#7841;i &#7903; m&#7897;t g&oacute;c nh&#7887; trong khu ph&#7889; c&#361;, trong c&#259;n nh&agrave; c&#361;. Ch&uacute;ng ta ch&#7881; c&oacute; th&#7875; ngo&aacute;i &#273;&#7847;u nh&igrave;n l&#7841;i, th&#7881;nh tho&#7843;ng l&#7845;y ra ng&#7855;m ngh&iacute;a, &ocirc;m &#7845;p nh&#7919;ng thanh &acirc;m x&#432;a th&#7853;t x&#432;a, kh&ocirc;ng th&#7875; kh&ocirc;i ph&#7909;c nh&#7919;ng g&igrave; v&#7889;n d&#297; kh&ocirc;ng th&#7875; kh&ocirc;i ph&#7909;c. M&#7885;i n&#7895; l&#7921;c c&#7889; g&#7855;ng l&agrave;m l&#7841;i t&#7915; &#273;&#7847;u gi&#7889;ng nh&#432; m&#7897;t tr&ograve; &#273;&ugrave;a n&#7921;c c&#432;&#7901;i.K&iacute; &#7913;c r&#7845;t &#273;&#7865;p. M&#7885;i th&#7913; ch&#7881; &#273;&#7865;p khi &#273;&atilde; th&agrave;nh k&iacute; &#7913;c. C&acirc;y &#273;&agrave;n c&#7911;a t&ocirc;i &#273;&atilde; n&#7857;m l&#7841;i trong nh&#7919;ng n&#259;m th&aacute;ng tr&#7867; d&#7841;i. N&oacute; tr&#7903; th&agrave;nh m&#7897;t ph&#7847;n n&#7895;i &#273;au, m&#7897;t ph&#7847;n ti&#7871;c h&#7853;n tuy&#7879;t &#273;&#7865;p. V&agrave; t&ocirc;i ch&#7845;p&nbsp; nh&#7853;n n&oacute;. T&#7921; nh&#7911; r&#7857;ng cu&#7897;c &#273;&#7901;i n&agrave;y c&oacute; l&#7869; ch&#7881; n&ecirc;n c&oacute; m&#7897;t c&acirc;y &#273;&agrave;n nh&#432; th&#7871;. &#272;&#7875; t&#7921; m&igrave;nh &#273;au bu&#7891;n, &#273;&#7875; nh&igrave;n l&#7841;i, ch&uacute;ng ta th&#7845;y m&#7897;t m&agrave;u x&aacute;m r&#7845;t trong.&nbsp;</body></html>

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