The acute phase of a disease is a rapid, but short-lived period of time where you experience symptoms of the disease. There may be no symptoms for up to two to 12 days after being bitten by an infected mosquito. Typically, there are no symptoms for three to seven days. Once symptoms appear, you'll probably experience about 10 days of chikungunya symptoms before getting better. You may experience these symptoms during the acute phase:   Fever: The fever is Usually 102 to 105 °F (39 to 40.5 °C) and typically lasts from three days up to one week. The fever can be biphasic (where it disappears for a few days followed by a few days of a low-grade fever (101–102 °F or 38–39 °C). During this time, the virus accumulates in your bloodstream, spreading to different parts of the body.  Arthritis (joint pain): You'll usually notice arthritis in the small joints of the hand, wrist, ankles, and larger joints, like knees and shoulders, but not the hips. Up to 70% of people have pain that spreads from one joint to the next after the previous joint starts feeling better. The pain is usually worse in the morning, but improves with mild exercise. Your joints may also look swollen or feel tender to the touch and you may have inflammation of tendons (tenosynovitis). Joint pain usually resolves within one to three weeks, with severe pain improving after the first week.  However, in some cases joint pain can continue for up to a year.  Rash: Approximately 40% to 50% of patients experience a rash. The most common type is a morbilliform eruption (maculopapular). These are red rashes with small bumps overlying them that appear three to five days after the start of fever and subside within three to four days. The rash usually starts on the upper limbs followed by the face and trunk/torso. Look in the mirror with your shirt off and note any red bumpy areas over a wide area and whether they itch. Make sure to turn around to look at your backside, back of neck, and raise your arms to examine your underarms. The subacute phase of...

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Write a summary of the previous text in Vietnamese:
Quan sát triệu chứng trong giai đoạn cấp tính. Biết về các triệu chứng trong giai đoạn bán cấp tính. Nhận biết các triệu chứng trong giai đoạn mạn tính. Quan sát các triệu chứng khác. Phân biệt bệnh sốt chikungunya với các bệnh tương tự.