Visas for Americans to Korea. American Citizens with valid U.S. passports may enter Korea for a period of 90 days without a visa (arrival day counts as day number one).merican Citizens with valid U.S. passports may enter Korea for a period of 90 days without a visa (arrival day counts as day number one).
If youâve been kissing them or sharing straws or drinks or eating utensils, go have your self checked for mono. They are contagious from the time they contract the virus themselves and may have not been symptomatic for 4 to 7 weeks. Mono has a long incubation period. Iâm sorry if this is bad news, but now you know. If you havenât been kissing or sharing spit, you should be pretty safe.
Nearly 90% of Americans have antibodies for mononucleosis by age 40. Mono has an incubation period of 30 to 40 days and the symptoms usually last 7 to 14 days but can last for several weeks. The virus can stay alive within the body for several months. The name mononucleosis comes from the fact that the disease distorts the white blood cells, causing them to only have one nucleus.